Secondary Base Station S1 Interface Setup for Coordinated Data Exchange
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Solution Overview
Problem
Current wireless network technologies, such as LTE, face challenges in implementing coordinated multi-point transmission/reception and carrier aggregation to enhance data exchange rates between user equipment and base stations, particularly in ensuring simultaneous service provision by multiple base stations.
Innovation Solution
A data exchange method and apparatus that enable multiple base stations to collaborate through S1, X2, or X3 interfaces, allowing bidirectional data transmission and coordination in serving user equipment, utilizing messages and protocols like S1 interface setup requests, X2 handover requests, and mobility management entity interactions to establish and manage connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple base stations are required to serve same user equipment to increase data exchange rate, then data exchange efficiency is improved, but system complexity increases
Solution Approach 1:
The patent segments the base station functionality into primary base station and secondary base station roles. The primary base station handles control plane functions while the secondary base station handles user plane functions, dividing the complex multi-base station coordination into manageable functional segments that reduce overall system complexity while maintaining high data exchange rates
Solution Approach 2:
The patent introduces an S1 interface as an intermediary communication channel between primary and secondary base stations. This standardized interface mediates the data exchange and coordination between multiple base stations, simplifying the interaction model and reducing system complexity while enabling efficient collaborative service delivery
2Reliability
If at least two base stations simultaneously provide service for one piece of UE, then service quality is improved, but coordination difficulty increases
Solution Approach 1:
The patent assigns different functional qualities to different base stations in the collaborative system. The primary base station is configured with control plane service capabilities while the secondary base station is configured with user plane service capabilities. This local differentiation of functional quality enables simultaneous service provision with reduced coordination overhead, as each base station operates with clearly defined local responsibilities
3Productivity
If S1 interface is established between primary and secondary base stations, then data transmission capability is improved, but interface management complexity increases
Solution Approach 1:
The patent designs the S1 interface to serve multiple functions simultaneously: it enables control plane signaling, user plane data transmission, and coordination between primary and secondary base stations. This multi-functionality reduces the need for multiple specialized interfaces, thereby improving data transmission capability while managing interface complexity through consolidation
Data Source
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AI summary
The present invention relates to a data exchange method and apparatus. The method includes: receiving, by a secondary base station, a first message sent by a primary base station, or receiving relationship information of a secondary base station and a primary base station configured by an operation, administration and maintenance system OAM, where the first message is used for notifying the secondary base station to set up an S1 interface; sending, by the secondary base station, an S1 interface setup request to the primary base station; receiving an S1 interface setup response sent by the primary base station; and performing, by the secondary base station, exchange with the primary base station by using the S1 interface. For the data exchange method and apparatus in the embodiments of the present invention, an interface between a primary base station and a secondary base station may be used to perform, or a secondary base station may be used to directly perform, data transmission with an SGW, thereby implementing that the primary base station and the secondary base station perform a coordinated service, and improving service quality for UE.