UE Control Resource Set Switching for Mixed 5G Numerologies
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Solution Overview
Problem
Existing 5G network designs face challenges in efficiently supporting diverse use cases with mixed numerologies and UE capabilities, leading to increased signaling overhead, power consumption, and congestion due to the need for multiple control resource sets.
Innovation Solution
Implementing two control resource sets for UEs: a first set obtained during random access and a second set configured based on UE capability, with each set having distinct RF bandwidths to optimize power consumption and signaling efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple control resource sets are configured for diverse use cases with mixed numerologies, then the network can support various UE capabilities and requirements, but the signaling overhead and device complexity increase
Solution Approach 1:
The control resource sets are segmented into a first control resource set for initial access and a second control resource set for dedicated communication. This segmentation allows UEs to monitor only the necessary control resource set based on their state and capability, reducing overall device complexity while maintaining support for diverse use cases
Solution Approach 2:
The first control resource set is designed to serve multiple purposes: it handles random access for all UEs regardless of capability and provides initial control information. This universal control resource set reduces signaling overhead by consolidating common functions while still supporting diverse UE capabilities through the capability-indication mechanism
2Adaptability or versatility
If multiple control resource sets are monitored by UEs, then access for diverse bandwidth capabilities is ensured, but power consumption increases
Solution Approach 1:
The system dynamically adjusts which control resource set a UE monitors based on its capability indication and current access state. UEs with limited bandwidth capability monitor only the first control resource set configured for their capability, while capable UEs can monitor the second control resource set. This dynamic adjustment reduces power consumption by avoiding unnecessary monitoring of control resource sets that the UE cannot utilize
Solution Approach 2:
Different control resource sets are configured with different bandwidth characteristics tailored to specific UE capability groups. The first control resource set has configurations suitable for UEs with limited bandwidth capability, while the second control resource set has configurations for UEs with higher bandwidth capability. This local optimization ensures each UE monitors only control resource sets appropriate for its capabilities, reducing power consumption
3Adaptability or versatility
If control resource sets are configured for mixed numerologies, then diverse data rate and latency requirements are met, but congestion increases
Solution Approach 1:
Control resource sets are segmented by numerology type and UE capability, creating separate monitoring groups. This segmentation prevents congestion by ensuring that UEs with specific numerology requirements only monitor control resource sets configured for their numerology, reducing unnecessary processing and network load from incompatible control information
Data Source
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AI summary
The present disclosure includes as one aspect a device comprising: a receiver capable of receiving control signal from a base station in a first set of control resources and in a second set of control resources, a transmitter capable of transmitting control signals and data, a circuitry which, when in operation, controls: the transmitter to transmit a random access message associated with the first set of control resources and to transmit communication device capability indication; the receiver to monitor control resources in the first set of control resources after transmitting the random access message and to receive within the first set of control resources configuration of the second set of control resources; the receiver to monitor control resources in the first set of control resources and/or in the second set of control resources after receiving the configuration of the second set of control resources.