Truncated UE Identifiers for Early Capability Retrieval
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Solution Overview
Problem
Existing 5G NR technologies face challenges in efficiently configuring communication links due to the limited size of RRC connection request messages, which prevent base stations from accurately determining UE capabilities and optimizing configurations for devices like bandwidth-reduced low complexity UEs, leading to suboptimal resource allocation.
Innovation Solution
UEs truncate their UE identities to generate truncated identifiers that can be transmitted in RRC connection requests, allowing base stations to determine appropriate core network entities and retrieve UE capabilities before configuring communication parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If UEs transmit full UE identities in RRC connection requests, then base stations can accurately determine UE capabilities, but message size exceeds limited capacity of RRC connection request format
Solution Approach 1:
The patent extracts only the necessary portion of the UE identity (truncated UE ID) that is sufficient for the base station to determine UE capability category, rather than transmitting the full UE identity. This extraction principle resolves the contradiction by providing just enough information for accurate capability determination while staying within message size constraints.
Solution Approach 2:
The patent enables the base station to perform preliminary determination of UE capability category before the complete RRC connection setup is finalized. By using the truncated UE ID early in the connection request, the base station can pre-configure appropriate parameters and resources, improving efficiency without requiring full identity transmission upfront.
2Manufacturing precision
If base stations wait for complete RRC connection setup to retrieve UE capabilities, then they can configure communication parameters accurately, but resource allocation efficiency decreases
Solution Approach 1:
The patent enables the base station to perform preliminary retrieval of UE capability information using the truncated UE ID from the connection request. This preliminary action allows the base station to pre-configure communication parameters and allocate resources appropriately before the complete RRC connection setup is finalized, thereby improving resource allocation efficiency while maintaining configuration accuracy.
Solution Approach 2:
The patent segments the UE identity transmission and capability retrieval process into stages: first using the truncated UE ID for initial capability determination and resource allocation, then completing the full identity verification and configuration in subsequent messaging steps. This segmentation allows efficient early resource allocation while ensuring accurate final configuration.
3Quantity of substance
If truncated UE identifiers are used, then message size fits within RRC connection request limits, but difficulty in detecting and measuring UE capabilities increases
Solution Approach 1:
The patent changes the parameter of UE identity representation from full-length to truncated form, and introduces a mapping relationship between truncated IDs and UE capability categories. This parameter change allows the message to fit within size limits while the base station uses the simplified truncated ID to efficiently determine capability category through pre-established mapping tables, reducing rather than increasing detection complexity.
Data Source
AI summary
A base-station (BS) receiving a random access request from user equipment (a UE), followed by a connection request. The connection request contains UE identity information which may have one of multiple formats depending on whether the access request and/or the connection request indicate that the UE is operating as a bandwidth-limited (BL) UE, an enhanced coverage (CE) UE, or a UE that operates in neither the BL mode nor the CE mode. In the BL mode, the UE may transmit a truncated identifier that is sufficient for the BS to retrieve capability information for the UE prior to transmitting a resource grant to the UE. The BS may then configure the UE and BS to using a radio configuration optimized for the UE's capabilities and transmit the resource grant in accordance with the optimized configuration.