Base Station IP Packet Encapsulation for E1/T1 Restoration
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Solution Overview
Problem
Existing methods for data transmission between 2G and 3G/4G base stations face challenges due to incompatibility between E1/T1 and IP transmission modes, leading to high bandwidth costs and limited capacity expansion, as well as increased bandwidth consumption and maintenance costs.
Innovation Solution
A method where a first base station encapsulates fragmented IP data, clock information, and link status into an IP packet for transmission over an IP network, allowing a second base station to restore it to E1/T1 data, enabling direct interconnection without an RNC or higher-level base station, thus reducing bandwidth loss and accommodating future data service demands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an E1 or T1 interface board unit is added in the new base station to establish an E1 or T1 transmission line, then data transmission between new and original base stations is enabled, but bandwidth cost increases and transmission bandwidth is limited
Solution Approach 1:
The patent introduces an RNC or higher-level base station as a conversion bridge between the new base station (3G/4G) and the original base station (2G). This intermediary performs protocol conversion, allowing IP transmission from the new base station to be translated into E1/T1 transmission for the original base station, thereby enabling compatibility without requiring the new base station to add dedicated E1/T1 interface boards
Solution Approach 2:
The RNC or higher-level base station serves multiple functions: it acts as a conversion bridge between different transmission protocols (IP and E1/T1), manages resource allocation, and enables both voice and data services across different generations of base stations through a single multi-functional node
2Adaptability or versatility
If an RNC or higher-level base station is used as a conversion bridge, then protocol incompatibility between E1/T1 and IP transmission modes is resolved, but transmission bandwidth consumption of the RNC increases
Solution Approach 1:
The patent segments the transmission path into two distinct parts: an IP transmission segment from the new base station to the RNC, and an E1/T1 transmission segment from the RNC to the original base station. This segmentation allows each segment to use the most appropriate transmission mode for its requirements, optimizing bandwidth utilization
Solution Approach 2:
The RNC performs parameter conversion between different transmission protocols, transforming IP packets into E1/T1 frames and adjusting timing and synchronization parameters to match the requirements of the original 2G base station, thereby enabling protocol compatibility without permanent bandwidth loss
3Adaptability or versatility
If an RNC or higher-level base station is used as a conversion bridge, then data transmission between different base station generations is enabled, but capacity expansion is limited due to interface capacity constraints
Solution Approach 1:
The patent transitions from a direct point-to-point connection model to a hierarchical multi-dimensional network structure, where the RNC operates at a higher network level to manage multiple connections simultaneously. This dimensional change allows the system to scale by adding more RNC nodes or higher-level base stations rather than being constrained by individual interface capacities
Data Source
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AI summary
Embodiments of the present invention provide a data transmission method, device, and system, which relate to the communications field. The method includes encapsulating, by a first base station, fragmented Internet Protocol IP data, first clock information, and first link status information into an IP packet, and sending the IP packet to a second base station through an IP transmission line so as to allow the second base station to restore the IP packet to E1 or T1 data. In the present invention, the first base station virtualizes IP data into E1/T1 data and transmits the E1/T1 data to the second base station through an IP network, and the second base station restores the E1/T1 data to real E1/T1 data, thereby implementing a transparent conversion between a packet switching transmission mode and a TDM transmission mode. The first base station and the second base station can be interconnected by using the IP network. This accommodates the evolution towards IP transmission and protects investment of an operator to the maximum extent.