UCI Multiplexing via Beta Offset Sequences for 5G NR
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face challenges in efficiently multiplexing uplink control information (UCI) for different service types like eMBB and URLLC, leading to overlapping issues between physical uplink control channels (PUCCH) and physical uplink shared channels (PUSCH) transmissions.
Innovation Solution
A base station (BS) configures UCI multiplexing by transmitting Radio Resource Control (RRC) configurations and Downlink Control Information (DCI) formats to user equipment (UE), using beta offset indexes to determine resource allocation and priority for UCI messages in PUSCH transmissions, ensuring timely and prioritized handling of UCI for both eMBB and URLLC service types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the UE multiplexes UCI in PUSCH transmission by checking timeline conditions and determining corresponding PUCCHs, then the resource allocation efficiency is improved, but the device complexity increases due to the need to handle multiple sequences and indicators for different service types
Solution Approach 1:
The patent segments the beta offset configuration into multiple sequences, where each sequence corresponds to a specific service type (eMBB or URLLC). The base station transmits different sequences for different service types, and the UE determines which sequence to use based on the service type of the current transmission. This segmentation allows the UE to handle different service types with dedicated configurations, improving resource allocation efficiency while managing device complexity through structured organization.
Solution Approach 2:
The patent implements dynamic selection of beta offset sequences based on service type. The base station transmits multiple sequences with different RRC parameters, and the UE dynamically determines which sequence to apply based on the service type (eMBB or URLLC) of the current UCI transmission. This dynamic approach enables flexible resource allocation that adapts to different service requirements, improving overall system productivity.
2Adaptability or versatility
If the base station transmits multiple sequences and indicators for different service types, then the adaptability for different service types is improved, but the loss of information increases due to the additional configuration overhead
Solution Approach 1:
The patent creates a universal configuration framework where a single RRC parameter structure can serve multiple service types. The base station transmits multiple sequences of beta offset values, each sequence being universally applicable to its corresponding service type (eMBB or URLLC). The UE selects the appropriate sequence based on service type indicators in the DCI, allowing the same configuration mechanism to handle both service types efficiently, improving adaptability while minimizing redundant information transmission.
3Reliability
If the UE prioritizes URLLC over eMBB in UCI multiplexing, then the reliability for URLLC services is improved, but the productivity of eMBB services deteriorates due to resource allocation
Solution Approach 1:
The patent applies local quality by assigning different beta offset sequences to different service types, allowing each service type to have optimized resource allocation parameters tailored to its specific requirements. URLLC traffic receives dedicated sequences with parameters optimized for reliability and low latency, while eMBB traffic receives sequences optimized for throughput. This localized optimization ensures that URLLC reliability is improved without fundamentally compromising eMBB productivity, as each service type operates with its own optimized configuration.
Solution Approach 2:
The patent changes parameters dynamically based on service type by transmitting multiple sequences of beta offset values with different RRC parameters. The base station selects which sequence to use based on the service type (eMBB or URLLC) indicated in the DCI format. This parameter change mechanism allows the system to switch between different resource allocation configurations, ensuring that URLLC receives the parameter settings needed for high reliability while eMBB maintains its productivity-optimized settings.
Data Source
AI summary
A base station (BS) and a method for configuring uplink control information (UCI) multiplexing performed by a BS are provided. The method includes: transmitting, to a user equipment (UE), a Radio Resource Control (RRC) configuration to configure a first sequence and a second sequence; transmitting, to the UE, a first downlink control information (DCI) format including a first indicator and a second DCI format including a second indicator; and receiving, from the UE, a UCI message which is multiplexed by the UE based on one of a first value corresponding to the first indicator and a second value corresponding to the second indicator. The first value corresponding to the first indicator is determined by the UE based on the first sequence. The second value corresponding to the second indicator is determined by the UE based on the second sequence.