Dynamic Uplink Sequence Length Selection for 5G NR-U
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR-U, face challenges in efficiently managing uplink transmissions to enhance power efficiency and flexibility, especially when coexisting with other radio access technologies like Wi-Fi.
Innovation Solution
The proposed solution involves dynamically selecting between different sequence lengths for uplink physical channels based on conditions such as UE capability, occupied channel bandwidth, and UL transmission characteristics, allowing for conditional configuration of resource allocations to optimize resource efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixed sequence length is used for uplink physical channel transmissions, then the system operation is simplified, but uplink resource efficiency and flexibility deteriorate
Solution Approach 1:
The patent implements dynamic sequence length selection where the UE can choose between first and second sequence lengths based on channel conditions and transmission requirements. This dynamic adaptation allows the system to optimize uplink resource efficiency while maintaining operational simplicity through pre-configured options.
Solution Approach 2:
The patent changes the sequence length parameter based on different transmission scenarios. The UE is configured with multiple sequence length options and selects the appropriate length according to channel bandwidth, power conditions, and transmission type, thereby improving resource efficiency without complicating the overall system operation.
2Reliability
If longer sequence lengths are always used for uplink transmissions, then coverage and reliability are improved, but signaling overhead and processing complexity increase
Solution Approach 1:
The patent applies partial action by using longer sequence lengths only when necessary for coverage extension or reliability improvement, rather than always using the longest sequence. The UE selects from multiple configured lengths, applying the appropriate level of redundancy based on actual transmission needs, thus reducing unnecessary signaling overhead.
Solution Approach 2:
The patent segments the sequence length configuration into multiple discrete options (first sequence length, second sequence length). This segmentation allows the system to provide reliability improvement through longer sequences only when needed, while maintaining lower overhead options for other scenarios, thereby reducing overall signaling overhead.
3Adaptability or versatility
If multiple sequence length configurations are provided for different radio access technologies, then adaptability and flexibility are improved, but device complexity and configuration management increase
Solution Approach 1:
The patent implements a universal configuration approach where the UE is provided with multiple sequence length configurations that can be applied across different radio access technologies (NR-U, LTE, Wi-Fi). This multi-functional configuration framework allows the same set of sequence length options to serve multiple RATs, improving adaptability while managing device complexity through a unified configuration mechanism.
Data Source
AI summary
A user equipment (UE), or other network component can operate to configure different sets of resources including different sequence lengths for an uplink (UL) transmission via a UL channel. A first length or at least one of different second lengths can be selected to configure the UL transmission based on one or more conditions, which can include a coexisting radio access technology (RAT), a UE capability, an occupied channel bandwidth (OCB), the type of UL transmission or the like. The UL transmission can be based on at least one of: the first or the second sequence length such as for an initial access procedure based on the coexisting RAT and the OCB, for example.