5G Control Channel Superposition for URLLC Reliability
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Solution Overview
Problem
The 5G communication system faces challenges in maintaining high reliability for control information when providing both eMBB and URLLC services using shared resources, as URLLC control information requires higher reliability than eMBB control information, and superposition transmission can compromise the reliability of both.
Innovation Solution
A method and device for identifying and decoding control channels in terminals, determining superposition transmission-related information, and generating control information to ensure reliable transmission of both eMBB and URLLC services by optimizing resource allocation and puncturing strategies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If superposition transmission is used to share resources between eMBB and URLLC services, then resource utilization efficiency is improved, but the reliability of control information for both services deteriorates
Solution Approach 1:
The patent segments the control information transmission by identifying specific control channels (eMBB control channel and URLLC control channel) and applying different handling strategies to each. The base station determines whether to puncture the eMBB control channel based on URLLC service requirements, while the URLLC control channel is transmitted with higher priority. This segmentation allows the system to maintain reliability for critical URLLC control information while still achieving resource sharing benefits.
Solution Approach 2:
The patent applies local quality by treating different control channels with different transmission qualities. The URLLC control channel is given higher priority and protected from puncturing, while the eMBB control channel may be punctured when URLLC services require resources. This localized differentiation ensures that critical control information maintains high reliability while allowing resource sharing for less time-critical services.
2Reliability
If dedicated resources are allocated to URLLC service, then the reliability and low latency conditions are satisfied, but the bandwidth requirement increases and frequency utilization efficiency deteriorates
Solution Approach 1:
The patent implements dynamic resource allocation where the base station determines in real-time whether to puncture the eMBB control channel based on URLLC service requirements. When URLLC services need resources, the system dynamically adjusts by puncturing eMBB control channel and transmitting URLLC control channel instead. This dynamic approach allows the system to guarantee URLLC reliability when needed while maintaining efficient frequency utilization by sharing resources when URLLC traffic is low.
Solution Approach 2:
The patent makes the control channel resources universal by allowing the same time-frequency resources to serve both eMBB and URLLC services. The base station can transmit either eMBB control information or URLLC control information on the same resources depending on service requirements. This multi-functionality enables the system to satisfy URLLC reliability conditions while improving overall frequency utilization efficiency compared to dedicated resource allocation.
Data Source
AI summary
The present disclosure relates to a 5G or pre-5G communication system to be provided to support a higher data transmission rate since 4G communication systems like LTE. The present disclosure relates to a method for providing control information for different services of a base station. A method of a first terminal includes: receiving control information; identifying a control channel for the first terminal based on the control information; and decoding information received in the control channel for the first terminal based on superposition transmission related information included in the control information.