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EP-4738934-A2 - USER EQUIPMENT (UE) AND CORE NETWORK FOR MANAGING NETWORK SLICE CONGESTION IN WIRELESS COMMUNICATION SYSTEM

EP4738934A2EP 4738934 A2EP4738934 A2EP 4738934A2EP-4738934-A2

Abstract

Embodiments herein provide a wireless communication system for managing a network slice congestion. The wireless communication system includes a User Equipment (UE), operably coupled to a core network. The UE is configured to transmit a first NAS signaling message to the core network, wherein the first NAS signaling message comprises a specific network slide identity. The core network is configured to detect the network slice congestion in the wireless communication system. Further, the core network is configured to indicate the network slice congestion using a second NAS signaling message to the User Equipment (UE), wherein the second NAS signaling message comprising a reject cause value and a back off timer for the requested network slice identity.

Inventors

  • JANGID, ALOK KUMAR
  • HASHMI, DANISH EHSAN
  • Uttur, Govind Irappa
  • JHA, KAILASH KUMAR
  • KUMAR, Lalith
  • KIM, SUNG-HOON

Assignees

  • Samsung Electronics Co., Ltd.

Dates

Publication Date
20260506
Application Date
20181015

Claims (14)

  1. A method, performed by a network entity, the method comprising: receiving a service request message comprising at least one protocol data unit, PDU, session ID; and transmitting a reject message including information on a back-off timer when congestion for a network slice is detected based on the at least one PDU session ID, wherein whether to perform a session management procedure is determined based on the reject message.
  2. The method of claim 1, wherein the back-off timer is associated with the network slice, or a combination of the network slice and a data network name, DNN.
  3. The method of claim 2, wherein the session management procedure is not performed for the network slice, or the combination of the network slice and the DNN, based on the back-off timer.
  4. The method of claim 2, wherein the reject message is a non Access Stratum, NAS, signaling message and further includes at least one cause associated with rejecting a PDU session corresponding to a PDU session ID.
  5. The method of claim 4, wherein the cause includes information on insufficient user plane resources for the PDU session.
  6. The method of claim 2, wherein the service request message is not triggered until the back-off timer expires.
  7. The method of claim 4, further includes receiving a service request message for the PDU session when the back-off timer expires.
  8. A network entity comprising: a transceiver; and at least one processor coupled with the transceiver and configured to: receive a service request message comprising at least one protocol data unit, PDU, session ID, and transmit a reject message including information on a back-off timer when congestion for a network slice is detected based on the at least one PDU session ID, wherein whether to perform a session management procedure is determined based on the reject message.
  9. The network entity of claim 8, wherein the back-off timer is associated with the network slice, or a combination of the network slice and a data network name, DNN.
  10. The network entity of claim 9, wherein the session management procedure is not performed for the network slice, or the combination of the network slice and the DNN, based on the back-off timer.
  11. The method of claim 9, wherein the reject message is a non Access Stratum, NAS, signaling message and further includes at least one cause associated with rejecting a PDU session corresponding to a PDU session ID.
  12. The method of claim 11, wherein the cause includes information on insufficient user plane resources for the PDU session.
  13. The method of claim 9, wherein the service request message is not triggered until the back-off timer expires.
  14. The method of claim 11, wherein the at least one processor is further configured to receive a service request message for the PDU session when the back-off timer expires.

Description

[Technical Field] The embodiment herein relates to a wireless communication system, and more particularly relates to a User Equipment (UE) and core network for managing network slice congestion in the wireless communication system. [Background Art] To meet the demand for wireless data traffic having increased since deployment of 4th generation (4G) communication systems, efforts have been made to develop an improved 5th generation (5G) or pre-5G communication system. The 5G or pre-5G communication system is also called a 'beyond 4G network' or a 'post long term evolution (LTE) system'. The 5G communication system is considered to be implemented in higher frequency (mmWave) bands, e.g., 60 GHz bands, so as to accomplish higher data rates. To decrease propagation loss of the radio waves and increase the transmission distance, beamforming, massive multiple-input multiple-output (MIMO), full dimensional MIMO (FD-MIMO), array antenna, analog beamforming, and large scale antenna techniques are discussed with respect to 5G communication systems. In addition, in 5G communication systems, development for system network improvement is under way based on advanced small cells, cloud radio access networks (RANs), ultra-dense networks, device-to-device (D2D) communication, wireless backhaul, moving network, cooperative communication, coordinated multi-points (CoMP), reception-end interference cancellation and the like. In the 5G system, hybrid frequency shift keying (FSK) and Feher's quadrature amplitude modulation (FQAM) and sliding window superposition coding (SWSC) as an advanced coding modulation (ACM), and filter bank multi carrier (FBMC), non-orthogonal multiple access (NOMA), and sparse code multiple access (SCMA) as an advanced access technology have been developed. The Internet, which is a human centered connectivity network where humans generate and consume information, is now evolving to the Internet of things (IoT) where distributed entities, such as things, exchange and process information without human intervention. The Internet of everything (IoE), which is a combination of the IoT technology and the big data processing technology through connection with a cloud server, has emerged. As technology elements, such as "sensing technology", "wired/wireless communication and network infrastructure", "service interface technology", and "security technology" have been demanded for IoT implementation, a sensor network, a machine-to-machine (M2M) communication, machine type communication (MTC), and so forth have been recently researched. Such an IoT environment may provide intelligent Internet technology services that create a new value to human life by collecting and analyzing data generated among connected things. IoT may be applied to a variety of fields including smart home, smart building, smart city, smart car or connected cars, smart grid, health care, smart appliances and advanced medical services through convergence and combination between existing information technology (IT) and various industrial applications. In line with this, various attempts have been made to apply 5G communication systems to IoT networks. For example, technologies such as a sensor network, MTC, and M2M communication may be implemented by beamforming, MIMO, and array antennas. Application of a cloud RAN as the above-described big data processing technology may also be considered to be as an example of convergence between the 5G technology and the IoT technology. As described above, various services can be provided according to the development of a wireless communication system, and thus a method for easily providing such services is required. [Disclosure] [Technical Solution] The principal object of the embodiments herein is to provide a User Equipment (UE) and a core network for managing network slice congestion in a wireless communication system. Another object of the embodiments herein is to indicate the network slice congestion using a second NAS signaling message to the User Equipment (UE), wherein the NAS signaling message comprising a reject cause value and a back off timer for the requested network slice identity. Another object of the embodiments herein is to perform a retransmission of a first NAS signaling message, once the back off timer is expired. Another object of the embodiments herein is to determine data path congestion on the PDU session IDs. Another object of the embodiments herein is to indicate the data path congestion to the UE using the second NAS signaling message, wherein the NAS signaling message comprises a reject cause value and a back off timer for the data plane congestion on the PDU session IDs. Another object of the embodiments herein is to store the back off timer for the data path congestion on the PDU session ID. Another object of the embodiments herein is to transmit the service request for user plane resources of the PDU session ID, to the core network after an expiry of the back off timer associa