Physical Uplink Control Channel Format Activation via Downlink Control Information
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Solution Overview
Problem
In LTE systems, the prior art faces challenges in efficiently allocating channel resources when multiple cells' CSI is reported in one sub-frame, leading to low use efficiency due to the discarding of CSI with low priority levels and inflexible resource allocation.
Innovation Solution
The method involves configuring and activating physical uplink control channel formats for user equipment through bit information in downlink control channels, using PDCCH DCI Formats 0 or 1A, to enable flexible CSI feedback and improve channel resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple CSI pieces are simultaneously reported in one sub-frame, then downlink scheduling performance is improved, but channel resource use efficiency deteriorates due to discarding low priority CSI
Solution Approach 1:
The patent implements dynamic activation and release of PUCCH formats through downlink control information, allowing the system to flexibly adjust which PUCCH formats are active based on current scheduling needs. This dynamic control enables the base station to activate specific PUCCH formats for reporting high-priority CSI while keeping other formats released, thereby avoiding resource waste from transmitting all CSI pieces simultaneously while ensuring critical downlink scheduling information is always reported.
2Reliability
If pre-configuration through higher layer signaling is used, then downlink scheduling is protected from serious impact, but resource allocation flexibility deteriorates
Solution Approach 1:
The patent segments the PUCCH format configuration into two layers: pre-configuration through higher layer signaling (providing a set of available PUCCH formats) and dynamic activation/release through downlink control information (selecting which formats are currently active). This segmentation allows the system to maintain stability through pre-configuration while achieving flexibility through dynamic selection, resolving the contradiction between reliability and adaptability.
Solution Approach 2:
By introducing dynamic activation and release mechanisms controlled by downlink control information, the patent transforms the static pre-configuration system into a dynamic one. The base station can now adaptively adjust which PUCCH formats are active based on real-time scheduling requirements, achieving both the stability of pre-configuration and the flexibility of dynamic resource allocation.
Data Source
AI summary
Embodiments of the present invention disclose a method and an apparatus for processing information. A base station configures at least one physical uplink control channel format for a user equipment and then sends downlink control information of a physical downlink control channel to the user equipment, and finally activates or releases, through bit information configured in the downlink control information of the physical downlink control channel, the at least one physical uplink control channel format for the user equipment to feed back channel state information.