Multi-RAT Bearer Separation for Control Signaling Delay
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Solution Overview
Problem
Existing multi-RAT networks face control signaling delays and inefficiencies in data channel capacity due to non-ideal backhaul assumptions, particularly in small cell networks employing mmWave frequency bands.
Innovation Solution
The method involves separating bearers for control and user planes in a multi-RAT network, using LTE wireless connections for control channel transmission, and establishing dedicated logical bearers between macro and small cell eNBs to optimize network design and reduce transmission delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If control plane and user plane are transmitted through the same backhaul link in multi-RAT networks, then device complexity is reduced, but control signaling delay increases
Solution Approach 1:
The patent segments the transmission paths by separating control plane and user plane into different backhaul links. Control plane traffic is routed through a first backhaul link while user plane traffic uses a second backhaul link, allowing independent optimization of each path to reduce control signaling delay without excessive complexity increase
Solution Approach 2:
The patent introduces an intermediary mechanism (separate backhaul links and dedicated logical bearers) that mediates between control plane and user plane transmissions. This intermediary structure enables control signals to be transmitted through optimized paths without being bottlenecked by user data traffic, reducing control signaling delay
2Adaptability or versatility
If non-ideal backhaul assumptions are used in small cell networks, then network deployment flexibility is improved, but data channel capacity is reduced
Solution Approach 1:
The patent segments data channel capacity by allocating dedicated logical bearers for different traffic types. User plane data is transmitted through separate dedicated bearers that are optimized for high capacity, while maintaining flexible backhaul assumptions for deployment adaptability
Solution Approach 2:
The patent changes the parameter of backhaul assumption from non-ideal to ideal for specific control plane transmissions. By assuming ideal backhaul for control plane traffic while maintaining non-ideal assumptions for user plane, the system achieves both deployment flexibility and enhanced data channel capacity
Data Source
AI summary
The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). A communication method and an apparatus for efficiently supporting a multi-radio access network (multi-RAN) within a wireless communication system are provided. The communication method of a second base station in a network using first wireless communication and second wireless communication includes receiving first information from a first base station via a first wireless communication link, receiving second information in a communication link which differs from the first wireless communication link, identifying control information to be transmitted via a second wireless communication link based on the first information, and identifying data to be transmitted via the second wireless communication link based on the second information, and transmitting the control information and the data via the second wireless communication.