PDCP Adaptation Layer for LTE-WLAN Aggregation Routing
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Solution Overview
Problem
Existing mechanisms fail to effectively route data packets to user equipment (UE) in LTE-WLAN aggregation systems, which is crucial for ensuring proper data delivery and quality of service in integrated networks.
Innovation Solution
A method and system where the evolved node B (eNB) includes a packet data convergence protocol (PDCP) adaptation layer that adds a header with bearer identification (ID), quality of service (QoS), and radio network temporary identifier (RNTI) to WLAN ID mapping information to data packets, enabling accurate routing through the WLAN access point (AP) to the UE.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data packets are routed through WLAN AP in LTE-WLAN aggregation system, then network capacity and data rate are improved, but packet routing accuracy and QoS management deteriorate due to lack of proper identification mechanisms
Solution Approach 1:
A PDCP adaptation layer is introduced as an intermediary component between the PDCP layer and WLAN interface. This adaptation layer acts as a mediator that translates LTE network parameters (bearer ID, QoS, RNTI) into WLAN-compatible header formats, enabling accurate packet routing through the WLAN AP without losing identification information.
Solution Approach 2:
The packet handling process is segmented into distinct functional layers: the PDCP layer generates packets with LTE identifiers, the PDCP adaptation layer adds header information with mapping relationships, and the WLAN AP uses this header for accurate routing. This segmentation allows each layer to specialize in specific routing functions.
2Reliability
If LTE controls WLAN aggregation, then QoS management and network control are improved, but system complexity increases due to additional adaptation layers and header processing
Solution Approach 1:
The PDCP adaptation layer performs multiple functions simultaneously: it adds header information, maintains mapping relationships between LTE and WLAN identifiers, enables QoS management, and supports accurate packet routing. This multi-functionality reduces the need for separate dedicated components for each function.
3Measurement precision
If header with bearer ID, QoS, and RNTI mapping information is added to packets, then packet identification and routing are improved, but processing time and overhead increase
Solution Approach 1:
The PDCP adaptation layer pre-establishes and maintains mapping relationships between LTE network identifiers (bearer ID, QoS, RNTI) and WLAN identifiers before actual data transmission. This preliminary action allows the WLAN AP to perform rapid lookup and routing decisions during packet forwarding, minimizing processing time.
Data Source
AI summary
The present disclosure relates to a communication method and system for converging a 5th-generation (5G) communication system for supporting higher data rates beyond a 4th-generation (4G) system with a technology for internet of things (IoT). The present disclosure may be applied to intelligent services based on 5G communication technology and IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. A system and a method for routing a data packet to a user equipment (UE) in a long term evolution-wireless local area network (LTE-WLAN) aggregation are provided. The system includes an evolved node B (eNB) with a packet data convergence protocol (PDCP) adaptation layer that adds a header to the data packet.