UE Capability Indication for Multe Fire Handover
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Solution Overview
Problem
In the LTE system, User Equipment (UE) cannot achieve handover functions between Multe Fire (MF) and 3GPP cells due to the lack of capability indication information related to the MF mode in Evolved Universal Terrestrial Radio Access (E-UTRA) capability information.
Innovation Solution
The UE indicates its MF mode capability to the base station by including frequency band and function features in the E-UTRA capability information, using RF and Function Group Indicator (FGI) parameters, allowing the base station to acquire and utilize this information for supporting MF mode functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If E-UTRA capability information structure is maintained as original without MF mode indication, then device complexity is reduced and ease of manufacture is improved, but the UE cannot achieve handover functions between MF and 3GPP cells due to missing capability indication information
Solution Approach 1:
The patent embeds MF mode capability indication information within the existing E-UTRA capability information structure. Specifically, it utilizes idle state FGI bits and repurposes measurement function feature bits to indicate MF mode capabilities, effectively nesting new information within existing data fields without adding separate independent structures.
Solution Approach 2:
The patent makes existing FGI bits and measurement function feature bits serve multiple purposes - their original functions for TDD/FDD mode indication are preserved while simultaneously enabling them to indicate MF mode capabilities. This multi-functionality allows the same information structure to support both traditional and new radio access technologies.
2Loss of information
If existing FGI bits are reused to indicate MF mode capability, then loss of information is reduced and adaptability is improved, but the original TDD/FDD mode indication function may be affected
Solution Approach 1:
The patent implements dynamic interpretation of FGI bits based on the operating mode. When the UE operates in TDD or FDD mode, the FGI bits indicate the original mode capabilities. When operating in MF mode, the same FGI bits indicate MF mode capabilities. This dynamic reinterpretation allows a single set of bits to serve different functions depending on context.
Solution Approach 2:
The patent reserves and defines the usage of idle state FGI bits and measurement function feature bits in advance for MF mode indication. By pre-configuring how these bits will be interpreted in MF mode, the system avoids conflicts and ensures that both original and new functions can coexist without requiring additional bits.
Data Source
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AI summary
A method and a device for indicating a UE capability, a UE and a base station are provided. The method for indicating the UE capability for use in the UE includes steps of: receiving from a base station a request message for acquiring the UE capability; indicating a capability of an MF mode supported by the UE in UE capability information, the capability of the MF mode supported by the UE including a frequency band and/or a function feature of the MF mode supported by the UE; and transmitting the UE capability information to the base station.