Capability Reporting for Intersystem Handover
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Solution Overview
Problem
Mobile terminals equipped with both FDD and TDD capabilities cannot simultaneously report both capabilities to an LTE network, leading to potential mismatches or inefficiencies in capability selection during intersystem handovers.
Innovation Solution
A method and apparatus that identify and report one of the capability groups (FDD or TDD) based on predefined criteria before a handover, ensuring accurate and efficient capability information is provided to the destination network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the mobile terminal reports only one capability group (FDD or TDD) to the LTE network, then the reporting interface complexity is reduced, but the capability information accuracy deteriorates due to potential mismatches with the destination network requirements
Solution Approach 1:
The mobile terminal performs capability identification in advance of the handover based on the inquiry message from the serving network. The terminal proactively determines which capability group (FDD or TDD) to report by comparing its supported capabilities with the destination network's requirements indicated in the inquiry message, rather than waiting for the handover to occur or making the selection at the last moment.
Solution Approach 2:
The serving network sends an inquiry message to the mobile terminal requesting capability information. The terminal responds with the identified capability group, and the serving network uses this feedback to make informed handover decisions. This feedback loop ensures the reported capability aligns with network requirements.
2Loss of time
If the mobile terminal selects a capability group based on simple criteria, then the processing time is reduced, but the reliability of capability matching with the destination network deteriorates
Solution Approach 1:
The mobile terminal uses the inquiry message from the serving network as feedback to determine the destination network's capability requirements. By comparing the indicated capability group in the inquiry message with its own supported capabilities, the terminal can quickly and accurately identify the appropriate capability to report, achieving both speed and reliability.
3Productivity
If the mobile terminal reports the capability that best matches the destination network requirements, then the handover efficiency is improved, but the device complexity increases due to the need to evaluate multiple capability groups
Solution Approach 1:
The mobile terminal performs the capability evaluation and identification process in advance of the actual handover, when receiving the inquiry message from the serving network. This preliminary action allows the terminal to prepare the correct capability information ready for reporting, ensuring efficient handover execution without complex real-time decision-making.
Solution Approach 2:
The inquiry message serves as feedback containing information about the destination network's capability requirements. The terminal uses this feedback to guide its capability selection process, comparing the indicated capability group with its own supported capabilities to determine the optimal capability to report for efficient handover.
Data Source
AI summary
Methods, apparatus, computer software and computer program products are provided to identify one of a plurality of capability groups, such as one of a frequency division duplex (FDD) capability or a time division duplex (TDD) capability, that will be utilized following a handover. In the context of a method, an inquiry for capability information is received in advance of a handover from a first network operating in accordance with one type of radio access technology to a second network operating in accordance with a different type of radio access technology. The method may then identify, based upon one or more predefined criteria, one of a plurality of capability groups to be utilized, such as by identifying the FDD or the TDD capability of the second network. The method may also cause the capability information to be provided including the capability group that has been identified.