Small Cell RRC Connection Optimization via Dedicated Preamble
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Solution Overview
Problem
Current mobile broadband communication systems face challenges in improving bandwidth and capacity while reducing costs, particularly due to the high performance and cost impact of mobility management entities (MME) when directly connected to multiple LTE home base stations.
Innovation Solution
A method and system where a small cell establishes a radio resource control (RRC) connection with a user equipment (UE) through a macro base station, allowing the macro base station to configure the small cell, thereby saving RRC signaling flows and allowing the small cell and UE to share data traffic, improving bandwidth and capacity, and reducing costs by determining if signaling radio bearers need to be re-established or modified based on a dedicated synchronization signal Preamble.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If LTE home base stations are directly connected to MME through S1 interface, then network control functionality is maintained, but MME performance and cost are greatly affected due to the large number of connections
Solution Approach 1:
The patent introduces a gateway as an intermediary node between the MME and multiple LTE home base stations. This gateway consolidates the S1 interface connections, allowing multiple base stations to connect through a single gateway interface rather than requiring individual MME connections for each base station, thereby reducing MME complexity while maintaining network control functionality
2Reliability
If signaling radio bearers are re-established or modified during RRC connection, then connection reliability is improved, but signaling overhead and access time increase
Solution Approach 1:
The patent applies preliminary action by pre-configuring and storing signaling radio bearer (SRB) information in the network before the UE needs to access. When a UE in idle state sends a dedicated Preamble, the network can quickly query stored SRB information and determine whether re-establishment is needed, rather than performing full SRB setup procedures from scratch, thus reducing signaling overhead and access time while maintaining connection reliability
3Productivity
If dedicated Preamble querying and SRB status checking is implemented, then access efficiency is improved, but device processing complexity increases
Solution Approach 1:
The patent uses copying by storing and reusing SRB configuration information from previous UE access instances. Instead of creating entirely new SRB configurations each time, the system queries and reuses stored SRB templates and parameter sets, reducing the processing complexity for each new access while improving overall access efficiency through faster configuration retrieval
Data Source
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AI summary
Embodiments of the present invention provide a method, a device and a system for wireless broadband communications, which are used to improve the bandwidth and the capacity of mobile broadband communications, and lower the cost at the same time. The method provided in an embodiment of the present invention includes: receiving, by a small cell (small cell), a dedicated synchronization signal Preamble sent through a first message by a user equipment UE in an idle state, where the dedicated Preamble is allocated when the UE accesses a network for the first time; querying, by the small cell according to the dedicated Preamble, whether a first signaling radio bearer SRB 1 and/or a second signaling radio bearer SRB2 of the UE are/is stored; if stored, replying, by the small cell in a second message to the UE, indication information that the SRB 1 and/or the SRB2 between the small cell and the UE do/does not need to be re-established or modified; and receiving an uplink radio resource control RRC message sent through a dedicated control channel DCCH by the UE.