LTE Gateway Data Offloading to Local Server
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Solution Overview
Problem
The existing data offloading methods in LTE systems, such as LIPA and SIPTO, require additional network elements and increased costs, making it difficult to reduce the pressure on the core network effectively.
Innovation Solution
A data offloading method and gateway that establishes links between the base station, core network, and local server, allowing the gateway to receive data packets from the base station and send non-VoLTE data directly to the local server, thereby bypassing the core network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If LIPA or SIPTO method is used to offload data services, then data offloading capability is improved, but device complexity and cost increase due to requiring additional local gateway elements
Solution Approach 1:
The patent extracts the data offloading function from the traditional LIPA/SIPTO architecture by removing the requirement for a separate local gateway element. The base station directly establishes a data radio bearer to the UE for offloading data services, taking out the intermediate gateway component while maintaining the offloading capability. This reduces network element complexity while preserving productivity.
Solution Approach 2:
The base station is赋予 (endowed) with multi-functionality to directly handle both control plane and user plane functions for data offloading. Instead of requiring a dedicated local gateway, the base station universally performs routing, packet filtering, and direct data transmission to UEs, eliminating the need for additional specialized network elements while maintaining offloading functionality.
2Productivity
If local gateway is added to establish direct channel between base station and local server, then data transmission efficiency is improved, but loss of energy and cost increase due to additional network elements
Solution Approach 1:
The patent removes the local gateway element from the data transmission path, extracting its function and distributing it between the base station and UE. The base station establishes direct data radio bearers to UEs for data offloading, eliminating the intermediate gateway that would consume additional energy. This maintains efficient direct transmission while reducing energy loss associated with extra network elements.
3Reliability
If traditional core network routing is used for all data, then network reliability is maintained, but productivity decreases due to core network pressure
Solution Approach 1:
The patent segments the data traffic into two paths: control plane traffic continues through the core network for reliability, while user plane data traffic for local services is segmented and routed directly from base station to UE via data radio bearers. This segmentation offloads data processing from the core network, improving productivity while maintaining reliability for control functions.
Solution Approach 2:
The base station acts as an intermediary that selectively routes data traffic. It mediates between the core network and UEs by establishing direct data radio bearers for local data offloading while maintaining standard routing for other traffic. This intermediary function reduces core network pressure while preserving reliability through selective direct routing.
Data Source
AI summary
An embodiment of the present application relates to the field of communication technologies, and particularly to a data offloading method and a gateway, for achieving data offloading and relieving pressure on a core network. The data offloading method according to the embodiment of the present application is applied to a long term evolution (LTE) system including a base station, a gateway, a core network, and a local server, wherein the base station establishes a link with the core network via the gateway and the base station establishes a link with the local server via the gateway. The method comprises: a gateway receives a first data packet transmitted by a base station, wherein the first data packet comprises first data; and the gateway transmits the first data to a local server upon determining that the first data packet is not a VoLTE data packet in an LTE system, thereby achieving offloading of non-VoLTE data and thus relieving the pressure on a core network.