UE Baseband Capability Signaling via Segmented Reporting
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Solution Overview
Problem
The existing LTE UE capability signaling solution results in large and complicated messages due to explicit signaling of bands and band combinations, leading to inefficient transmission and storage of UE capabilities, and does not accurately reflect the UE's processing capabilities, particularly for features like MIMO, NAICS, and CSI, which are independent of carrier frequencies.
Innovation Solution
The proposed solution involves separating baseband capabilities from band combinations and using a structured signaling approach where UE groups bands and band combinations with associated baseband capabilities, allowing for efficient reporting of capabilities without duplicating band combinations, and using cost credits to represent processing power for features like MIMO and NAICS.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If explicit signaling of bands and band combinations is used to report UE capabilities, then comprehensive capability information is provided to the network, but message size and complexity increase significantly
Solution Approach 1:
The UE capability signaling is segmented into two independent parts: (1) a compact indication of supported baseband capability sets, and (2) a separate detailed description of each baseband capability set. This segmentation allows the network to first identify which capability sets are supported without immediately processing all detailed parameters, thereby reducing message complexity while preserving complete capability information.
Solution Approach 2:
Baseband capability information is extracted from the traditional band combination signaling structure and presented as independent capability sets. Each baseband capability set contains parameters such as MIMO layers, NAICS, and CSI processes that are independent of specific band combinations. This extraction eliminates the need to repeat capability parameters across multiple band combination entries, reducing overall message size and complexity.
2Measurement precision
If detailed baseband capabilities are signaled for each band combination, then accurate processing capability information is provided, but transmission and storage efficiency decrease
Solution Approach 1:
Baseband capability sets are designed as universal, multi-functional units that can be applied to multiple band combinations. Each capability set (e.g., set A, set B, set C) represents a complete configuration of processing capabilities that can be independently selected and reused across different band combinations. This universality allows the same capability parameters to serve multiple purposes without repetition, improving signaling efficiency while maintaining precise capability representation.
Solution Approach 2:
Instead of repeating detailed capability parameters for each band combination, the patent uses compact references or indices to point to previously defined baseband capability sets. The network can efficiently store and process these references rather than full capability descriptions, significantly reducing storage requirements and transmission overhead while maintaining the ability to retrieve complete capability information when needed.
3Adaptability or versatility
If UE reports all supported band combinations with their respective capabilities, then network can optimize configuration, but signaling overhead increases
Solution Approach 1:
The patent applies local quality by allowing different levels of capability detail at different stages of the signaling process. The initial capability indication uses compact baseband capability set references for efficiency, while detailed capability parameters are available on-demand or only for currently relevant band combinations. This localized detail provision reduces overall message size while maintaining the network's ability to optimize configurations when needed.
Data Source
AI summary
According to some embodiments, a method of signaling device capabilities for use in a wireless device comprises compiling frequency band combinations supported by the wireless device. The method further comprises compiling a set of device capabilities supported by the wireless device and assembling a capability message. The capability message includes: the frequency band combinations; combinations of the device capabilities supported by the wireless device; and for each of the one or more frequency band combinations, the capability message includes a first indication of one or more device capabilities supported by the frequency band combination. The first indication of the device capabilities supported by the frequency band combination comprises, for each band of the plurality of frequency bands, an indication of one of the one or more combinations of the device capabilities supported by the band when used in combination with the other bands in the frequency band combination.