Mobile Station Connection Setup Request Signal Redirection
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Solution Overview
Problem
In conventional WCDMA mobile communication systems, when a mobile station with multi-RAT capabilities transitions to a different communication scheme, the initial radio resource in the first scheme is wasted, and the connection setup time in the second scheme is prolonged.
Innovation Solution
A mobile communication method where the mobile station transmits a connection setup request signal containing its radio access capabilities to the network device of the first communication scheme, allowing for redirection to the second scheme upon detection of a predetermined trigger, enabling the network device to instruct the mobile station to set up a connection in the second scheme, thereby optimizing resource usage and reducing setup time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the mobile station sets up a connection in the first communication scheme before transitioning to the second communication scheme, then the connection setup procedure follows the established RRC Connection Setup Procedure, but the radio resource in the first communication scheme is wasted and the connection setup time in the second communication scheme is prolonged
Solution Approach 1:
The mobile station includes its radio access capability information in the connection setup request signal transmitted to the first communication scheme network device. This preliminary action enables the network device to determine in advance whether to redirect the mobile station to the second communication scheme, avoiding the need to establish a full connection in the first scheme before transition, thereby reducing connection setup time while maintaining procedural reliability
2Ease of manufacture
If the mobile station sets up a connection in the first communication scheme before transitioning to the second communication scheme, then the established RRC Connection Setup Procedure is followed, but the radio resource in the first communication scheme is wasted
Solution Approach 1:
The mobile station transmits its radio access capability information in the connection setup request signal as a preliminary action. This allows the network device to make an early determination about scheme redirection before allocating significant radio resources, thereby reducing radio resource waste while maintaining the standardized procedure framework
Solution Approach 2:
The mobile station proactively provides its own radio access capability information to the network device, enabling the network to make informed redirection decisions without requiring the mobile station to first establish a connection and then report capabilities, thus reducing unnecessary radio resource consumption
Data Source
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AI summary
A mobile communication method according to the present invention includes a step of a mobile station UE transmitting a connection setup request signal containing a radio access capability of the mobile station eNB to a radio network controller RNC of a UMTS scheme, upon detecting a predetermined trigger while camping on in a cell of the first communication scheme, a step of the radio network controller RNC of the UMTS scheme transmitting an instruction signal for instructing setup of a connection in a cell of an LTE scheme to the mobile station UE, in a case where the radio access capability of the mobile station UE is contained in the received connection setup request signal, and a step of the mobile station UE setting up the connection in the cell of the LTE scheme in response to the received instruction signal.