Downlink Control Channel Resource Configuration for UE Without RRC Connection
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Solution Overview
Problem
Current mobile communication systems face challenges in configuring flexible downlink control channel resources, especially for user equipment that does not establish an RRC connection, leading to inflexible resource allocation and increased power consumption and latency.
Innovation Solution
A method and apparatus for determining a downlink control channel resource, where the user equipment configures a resource set to transmit a UE-specific physical downlink control channel based on an indication message from the base station or predefined protocol definitions, allowing flexible resource configuration even without an RRC connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the terminal is required to listen to the downlink control channel over the entire transmission bandwidth, then the resource utilization is improved, but the power consumption control of the terminal deteriorates and the delay at the terminal side is increased
Solution Approach 1:
The patent divides the downlink control channel resources into two distinct types: common downlink control channel resources (for system information and common control) and UE-specific downlink control channel resources (for dedicated control information). This segmentation allows the terminal to selectively monitor only the common resources without RRC connection, avoiding the need to scan the entire bandwidth, thus reducing power consumption while maintaining resource utilization efficiency.
Solution Approach 2:
The patent introduces dynamic resource allocation where the base station can flexibly configure and indicate UE-specific downlink control channel resources through downlink signaling. This dynamic approach allows the system to adapt resource allocation based on actual needs, enabling terminals to monitor only necessary resources rather than the entire bandwidth, thereby reducing power consumption and delay.
2Productivity
If the terminal is required to listen to the downlink control channel over the entire transmission bandwidth, then the resource utilization is improved, but the delay at the terminal side is increased
Solution Approach 1:
By segmenting control channel resources into common and UE-specific types, the patent enables terminals to quickly access common resources without RRC connection, reducing the time required to obtain control information and minimizing delay while maintaining efficient resource utilization.
Solution Approach 2:
The patent pre-configures common downlink control channel resources that are always available and known to terminals before RRC connection is established. This preliminary preparation allows terminals to immediately access control information without scanning the entire bandwidth, reducing access delay while maintaining resource utilization efficiency.
3Productivity
If the transmission resources of downlink control channel are configured more flexibly, then the resource utilization is improved, but the device complexity increases
Solution Approach 1:
The patent introduces downlink signaling as an intermediary mechanism that carries configuration information for UE-specific downlink control channel resources. This intermediary approach allows flexible resource configuration to be managed by the base station rather than the terminal, reducing terminal complexity while enabling flexible resource utilization.
Solution Approach 2:
The patent enables flexible resource allocation by allowing the base station to dynamically change parameters such as resource location, bandwidth, and timing of UE-specific downlink control channels through signaling. This parameter-based flexibility achieves high resource utilization without requiring complex terminal-side resource management logic.
Data Source
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AI summary
A method and apparatus of determining a downlink control channel resource, a user equipment and a base station are provided. The method of determining a downlink control channel resource at the user equipment side includes: receiving an indication message sent by a base station, and determining, according to the indication message, a first resource set configured to transmit a UE-specific physical downlink control channel of the user equipment; or determining, according to a protocol definition, a first resource set configured to transmit a UE-specific physical downlink control channel of the user equipment.