Terminal Capability Signaling for REDCAP Filtering Compatibility
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Solution Overview
Problem
Existing technologies face challenges in efficiently obtaining capability information from reduced capability terminal devices (REDCAP UEs) due to limited hardware capabilities, leading to unnecessary communication resource overheads and reduced interoperability.
Innovation Solution
The method involves the terminal device explicitly or implicitly indicating its inability to perform capability filtering, allowing the network device to determine that it should receive a full capability report, thereby avoiding secondary enquiries and reducing resource overheads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If capability filtering enquiry is used to reduce the length of capability information bitstream, then communication resource overhead is reduced, but interoperability and compatibility between terminal devices and network devices deteriorates
Solution Approach 1:
The terminal device performs preliminary action by explicitly indicating its capability filtering support status before the capability enquiry procedure. This allows the network device to pre-determine the appropriate enquiry method and avoid subsequent misunderstandings or compatibility issues, while still achieving efficient communication resource utilization.
2Reliability
If REDCAP UE reports full capability information, then interoperability is improved, but communication resource overhead increases
Solution Approach 1:
The system dynamically adapts the capability information transmission based on the terminal device's type and filtering capability. The network device adjusts its enquiry behavior according to the terminal's indicated capability filtering support status, optimizing the balance between interoperability and communication resource overhead for different device types.
3Measurement precision
If network device performs secondary capability enquiry to verify filtering support, then capability information accuracy is improved, but communication resource overhead increases
Solution Approach 1:
The terminal device provides preliminary indication information about its capability filtering support status before the capability enquiry. This eliminates the need for secondary verification enquiries by the network device, as the terminal's filtering capability is already known from the initial indication, thus reducing communication resource overhead while maintaining accuracy.
Data Source
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AI summary
A capability information transmission method and a communication apparatus are provided. A terminal device explicitly or implicitly indicates, to a network device, that the terminal device supports or does not support a capability filtering enquiry, to help the network device determine that the terminal device does not support capability filtering. This ensures that the terminal device and the network device have a consistent understanding of whether the terminal device supports the capability filtering. When the terminal device does not support band capability filtering, the terminal device does not perform capability filtering, to implement low complexity, low costs, and low energy consumption of the terminal device. A capability enquiry without a filter condition may be used by the network device, so that a size of capability enquiry information can be reduced, consumption of communication resources can be reduced, and air interface resource overheads can be reduced. In addition, the network device may determine that a capability reported by the terminal device is a full capability.