UE Capability Reporting Differential Updates
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Solution Overview
Problem
In wireless communication systems, particularly in NR and LTE, the UE capability information messages are large due to redundant data, leading to increased signaling overhead during capability reporting procedures, which hampers efficient communication.
Innovation Solution
Implementing a technique where the UE provides only changed or requested capability information in subsequent messages, indicated by a specific indication, thereby reducing the message size and eliminating redundant data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE transmits complete capability information messages, then the network receives comprehensive capability data, but the message size increases leading to higher signaling overhead
Solution Approach 1:
The patent extracts and transmits only the changed capability information elements in subsequent messages after the initial complete capability report. Instead of sending the entire capability information message repeatedly, the UE identifies and transmits only the specific capability elements that have changed since the last report, thereby reducing message size while maintaining information completeness.
Solution Approach 2:
The capability information message is segmented into multiple parts: an initial complete capability report followed by subsequent differential updates. Each subsequent message contains only the changed capability elements rather than the complete set, effectively dividing the transmission into manageable segments that reduce overall signaling overhead.
2Reliability
If the UE transmits complete capability information in subsequent messages, then all capability data is available, but signaling overhead increases hampering efficient communication
Solution Approach 1:
The patent extracts only the changed capability information elements for transmission in subsequent messages. The network maintains the complete capability profile by combining the initial full report with subsequent differential updates, ensuring data availability while improving communication efficiency through reduced message sizes.
3Quantity of substance
If the UE transmits only changed capability information, then message size decreases, but the need for additional indication fields increases device complexity
Solution Approach 1:
The patent applies preliminary action by having the UE transmit an indication field in advance that signals whether changed capability information is present in the subsequent message. This allows the network to efficiently process the differential updates without requiring complex parsing logic, as the indication field provides upfront information about the message content.
4Quantity of substance
If differential capability reporting is implemented, then signaling overhead is reduced, but the protocol processing complexity increases
Solution Approach 1:
The indication field is transmitted in advance to signal the presence of changed capability information. This preliminary indication allows both UE and network to efficiently manage the differential reporting process without requiring complex real-time analysis, thereby reducing protocol processing complexity while maintaining reduced signaling overhead.
Data Source
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AI summary
Certain aspects of the present disclosure provide techniques and apparatus for reducing user equipment (UE) capability information message size. A method for wireless communications by a UE is provided. The UE sends a first UE capability information message to a base station (BS) including a first set of UE capability information. The UE sends at least a second UE capability information message to the BS subsequent to sending the first UE capability information message including a second set of UE capability information. The second set of UE capability information does not include one or more UE capabilities included in the first set of UE capability information. The BS receives the first and second UE capability information.