Wireless Backhaul for Small Cell RBS Using Intermediary Client
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Solution Overview
Problem
Existing technologies face challenges in establishing and managing backhaul connections for small cell radio base stations using Internet Protocol (IP) based technologies like LTE, particularly in non-line-of-sight (NLOS) links, including determining suitable packet data network gateways and configuring IP addresses for small cell RBS.
Innovation Solution
A method where a small cell RBS triggers a client to establish a wireless backhaul connection with the core network, with the client deriving base station property information to request and configure IP addresses, gateways, and bearers, enabling seamless integration and operation of IP-based technologies like LTE.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If IP based technology (LTE) is used to realize the NLOS link for backhaul, then data transfer speed and spectrum efficiency are improved, but the complexity of establishing backhaul connection and finding suitable PDN-GW increases
Solution Approach 1:
The patent introduces a network access device as an intermediary between the small cell RBS and the core network. This intermediary automatically establishes the backhaul connection by deriving base station property information from the RBS and using it to request appropriate IP configuration and gateway selection, thereby resolving the complexity of direct IP-based connection establishment while maintaining high data transfer speeds
Solution Approach 2:
The network access device performs self-service by automatically deriving base station property information, selecting appropriate PDN-GW, and configuring IP addresses without manual intervention. This automation resolves the technical contradiction by eliminating the complexity burden from the system while enabling fast IP-based data transfer
2Ease of operation
If a client is introduced to manage the backhaul connection, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The network access device performs multiple functions: it acts as a client to manage backhaul connections, derives base station property information, selects PDN-GW, and configures IP addresses. This multi-functionality improves ease of operation while avoiding the need for separate dedicated devices, thereby not increasing overall system complexity
Data Source
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AI summary
The present disclosure relates to devices and methods for establishing and maintaining backhaul connections between small cell radio base stations and a core network. In particular it relates to methods using a client to manage the backhaul connection. According to one aspect, the method relates to receiving, from the small cell RBS, at least one message triggering the establishment of the wireless backhaul connection between the small cell RBS and the core network. The method further comprises deriving, from the at least one message, base station property information of the small cell RBS. The method further comprises sending, to a core network node, a connectivity request message, including the derived base station property information thereby enabling a selection of a packet gateway and/or a configuration for the small cell RBS in the establishment of the wireless backhaul connection. The disclosure also relates to a method performed in a core network node and to a corresponding client and core network node.