Mobile Terminal Protocol Version Negotiation
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Solution Overview
Problem
In LTE systems, compatibility issues arise when the highest protocol version supported by a mobile terminal is greater than that supported by the base station, leading to potential interconnection problems or disastrous consequences.
Innovation Solution
A protocol version negotiation method where the base station sends an air interface message indicating its highest protocol version before querying the mobile terminal's capability set, allowing the mobile terminal to configure its protocol version to match the base station's if it exceeds the base station's version, thus ensuring compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the mobile terminal reports the highest protocol version supported by the mobile terminal using the mobile terminal capability set, then the mobile terminal can indicate its capability, but if the highest protocol version supported by the mobile terminal is later than the highest protocol version supported by the base station, the base station is unable to obtain the highest protocol version supported by the mobile terminal according to the mobile terminal capability set, and unable to ensure compatibility with the mobile terminal
Solution Approach 1:
The base station sends an air interface message indicating its highest protocol version before the mobile terminal reports its capability set. This preliminary action allows the mobile terminal to know the base station's protocol version capability in advance, enabling it to adjust its reported protocol version to ensure compatibility, thus preventing information loss and ensuring reliable interconnection.
2Measurement precision
If the base station queries the mobile terminal capability set to obtain protocol version information, then the base station can identify terminal capabilities, but compatibility problems occur when the mobile terminal supports a later protocol version than the base station
Solution Approach 1:
The mobile terminal changes the protocol version parameter it reports based on the base station's capability. When the mobile terminal detects that its highest supported protocol version is later than the base station's, it adjusts the reported protocol version to match the base station's capability, ensuring compatibility while maintaining accurate capability identification.
3Productivity
If the mobile terminal uses its highest supported protocol version, then the terminal can utilize advanced features, but interconnection problems or disastrous consequences occur when the base station cannot support that version
Solution Approach 1:
The base station provides its protocol version capability information in advance through an air interface message before the mobile terminal reports its capabilities. This allows the mobile terminal to perform preliminary assessment and adjust its protocol version selection to ensure compatibility, preventing interconnection problems while maximizing feature utilization within compatible limits.
Data Source
AI summary
The present invention discloses a protocol version negotiation method, a mobile terminal and a base station. The method includes: receiving, by a mobile terminal, an air interface message sent by a base station according to a 3GPP protocol, where the air interface message includes an information element for indicating a highest protocol version supported by the base station, and the air interface message is sent before the base station sends a request message for querying the mobile terminal capability set; obtaining the highest protocol version supported by the base station according to the information element; and if the highest protocol version supported by the mobile terminal is later than the highest protocol version supported by the base station, configuring, by the mobile terminal, a protocol version used by the mobile terminal to a protocol version same as the highest protocol version supported by the base station.