5G Relay Device Selection for Network Slice Session Establishment
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Solution Overview
Problem
In a 5G network architecture, when a user equipment (UE) accesses a network slice via a customer premises equipment (CPE) that does not support the required network slice, the UE cannot establish a session, leading to service disruptions due to incompatible data resource bearers (DRBs) across different network slices.
Innovation Solution
A session establishment method involving an access network device that selects a relay device to facilitate UE session establishment by configuring data resource bearers (DRBs) in the requested network slice, and a relay device selection method that ensures compatibility by using relay service codes (RSCs) to increase the success rate of session establishment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a CPE is used to provide wired broadband access to UE, then the UE can access the core network through the CPE, but the UE cannot establish a session in a network slice when the CPE does not support the required network slice
Solution Approach 1:
The patent introduces a relay device as an intermediary component between the CPE and the UE. The relay device is capable of supporting multiple network slices and acts as a mediator to enable UE to access supported network slices even when the CPE does not support them. The relay device receives data from the CPE and forwards it to the UE with proper network slice identification, thereby resolving the contradiction between ease of access and session establishment reliability.
2Productivity
If different network slices share a common data resource bearer (DRB) between CPE and RAN, then resource utilization is improved, but services in different network slices cannot be properly supported
Solution Approach 1:
The patent applies segmentation by dividing the data transmission path into separate logical channels for different network slices. The relay device segments the data stream from the CPE into multiple DRBs, each associated with a specific network slice identifier (S-NSSAI). This allows the system to maintain multiple isolated data paths within the same physical infrastructure, enabling both high resource utilization and proper support for multiple network slices with different service requirements.
Solution Approach 2:
The patent implements local quality by assigning different quality characteristics to different DRBs based on their associated network slice requirements. Each DRB is configured with specific parameters (such as QoS settings) that are tailored to the requirements of its corresponding network slice. The relay device applies different local qualities to different segments of the data stream, ensuring that each network slice receives the appropriate service quality while sharing the same physical transmission medium.
Data Source
AI summary
Embodiments of this application relate to the field of communications technologies, and disclose a session establishment method, and a user equipment. The method may include: receiving, by a relay device, a reconfiguration request message sent by an access network device, wherein the reconfiguration request message comprises data resource bearer (DRB) configuration information and an identity of user equipment (UE), wherein the DRB configuration information is information about a DRB corresponding to single-network slice selection assistance information (S-NSSAI) requested by the UE; and transmitting, by the relay device, signaling and/or data of the UE on the DRB corresponding to the DRB configuration information.