Dual Connectivity Scheduling Without Random Access
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Solution Overview
Problem
In LTE systems, dual connectivity management is challenging due to the lack of efficient methods for base stations to determine when to initiate transmissions for user equipment without performing a random access procedure, affecting scheduling and communication efficiency.
Innovation Solution
A method and device that involve a first base station configuring a radio resource control connection with a communication device, transmitting a secondary cell group configuration, and receiving a complete message to initiate scheduling by the second base station, even if the communication device does not perform a random access procedure, allowing for seamless dual connectivity operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the second base station waits for random access procedure completion before starting transmissions, then communication reliability is improved, but scheduling efficiency and communication speed deteriorate
Solution Approach 1:
The patent applies preliminary action by having the second base station start scheduling transmissions before the random access procedure is fully completed. The second BS begins scheduling at least one transmission for the communication device based on the SCG configuration received from the first BS, without waiting for random access completion. This allows scheduling to occur in advance, improving efficiency while maintaining reliability through the established signaling protocol.
2Reliability
If the random access procedure is performed, then connection reliability is improved, but communication delay increases
Solution Approach 1:
The patent implements preliminary action by initiating transmission scheduling before the random access procedure completes. The second base station receives the SCG configuration and starts scheduling transmissions in advance, reducing the time loss associated with waiting for random access completion while maintaining connection reliability through the configured signaling exchange.
3Productivity
If the second base station starts scheduling without random access procedure, then scheduling efficiency is improved, but connection reliability deteriorates
Solution Approach 1:
The patent uses the first base station as an intermediary to transmit the SCG configuration to the second base station. This intermediary mechanism enables the second BS to start scheduling efficiently without direct random access, while the configured signaling protocol maintains connection reliability. The first BS mediates the information exchange that allows efficient scheduling initiation.
Data Source
AI summary
A method for handling dual connectivity comprises a first base station (BS) configuring a radio resource control (RRC) connection with a communication device via a first cell of the first BS; a second BS transmitting a secondary cell group (SCG) configuration to the first BS; the first BS transmitting a RRC message on the RRC connection via the first cell to the communication device, wherein the RRC message comprises the SCG configuration; the first BS receiving a RRC complete message from the communication device via the first cell or a second cell of the first BS; the first BS transmits a complete message to the second BS; and the second BS starting scheduling at least one transmission for the communication device, when the second BS receives the complete message and the SCG configuration indicates the communication device not to perform a random access procedure.