Rate Matching in 5G Control Resource Regions
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in utilizing control resource regions for data transmission, leading to underutilization of resources in both uplink and downlink channels, particularly in the control resource sets.
Innovation Solution
The method involves semi-static signaling and dynamic signaling to indicate the utilization of control resource sets for data transmission, allowing for rate matching in unused resources within the control resource region, enabling efficient data transmission in both uplink and downlink channels by adapting the code rate based on available resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If control resource sets are dedicated solely for control channel transmissions, then control signaling reliability is ensured, but resource utilization efficiency deteriorates due to unused resources when control traffic is light
Solution Approach 1:
The patent enables control resource sets to serve dual purposes: carrying control channel transmissions when control traffic is present, and carrying data transmissions when control traffic is absent or reduced. This multi-functionality allows the same time-frequency resources to be dynamically allocated between control and data channels, improving overall resource utilization while maintaining control signaling reliability when needed.
Solution Approach 2:
The patent introduces dynamic indication mechanisms where the network device signals to the terminal device which control resource sets are currently allocated for control channels versus data channels. This dynamic allocation allows the system to adapt resource usage based on actual control traffic conditions, transitioning resources between control and data functions as needed.
2Productivity
If control resource region resources are allocated for data transmission, then resource utilization improves, but control signaling capacity deteriorates when control traffic increases
Solution Approach 1:
The system dynamically adjusts the allocation of control resource sets between control and data functions based on real-time traffic conditions. When control traffic increases, more control resource sets are allocated to control channels; when control traffic decreases, more resources are allocated to data transmissions. This dynamic adaptability ensures both resource utilization and control signaling capacity are optimized according to actual needs.
Solution Approach 2:
The patent employs feedback mechanisms where the network device monitors control traffic conditions and sends indication information to terminal devices about current resource allocations. This feedback loop allows the system to respond to changing traffic conditions and adjust resource allocation accordingly, balancing data transmission opportunities with control signaling requirements.
3Reliability
If rate matching is performed around control resource sets, then data transmission reliability improves by avoiding control channel resources, but data transmission efficiency deteriorates due to reduced available resources
Solution Approach 1:
The patent enables dynamic rate matching behavior where the terminal device adjusts its rate matching strategy based on network indications. When control resource sets are indicated for control channel usage, the terminal performs rate matching around those resources. When control resource sets are indicated for data usage, the terminal can utilize those resources without rate matching, thereby improving data transmission efficiency while maintaining reliability through dynamic adaptation.
Data Source
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AI summary
A control resource region of an New Radio system slot structure may be separated into control resource sets, only some of which may be used for control transmissions. Aspects presented herein improve the efficient utilization of resources by enabling data transmission in resources of the DL control resource region and/or the UL control resource region. A UE receives an indication of a control resource set in a control resource region of a slot that may provide a control channel resource or a data channel resource and performs rate matching for data transmissions in the data channel based at least in part on the indication. The indication may be a semi-static indication, e.g., RRC signaling, of the control resource set.