Semi-Persistent Scheduling Resource Release via DCI Field Values
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Solution Overview
Problem
Current wireless communication systems lack a reliable method to release semi-persistent uplink and downlink communication resources, leading to inefficiencies in resource allocation and utilization.
Innovation Solution
Incorporating a specific SPS release value in DCI formatted messages, where a user agent recognizes certain field values as indicators to release allocated resources, ensuring reliable deactivation of semi-persistent scheduling resources by comparing received data to fixed SPS release values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If semi-persistent scheduling is used to allocate resources, then resource allocation efficiency is improved, but there is no reliable method to release resources leading to resource waste
Solution Approach 1:
The patent applies preliminary action by pre-defining specific DCI field value combinations as release indicators before resource allocation occurs. When these predetermined values are detected in downlink control information, the user agent automatically releases the semi-persistent uplink resources without requiring additional signaling or complex release procedures, thus enabling efficient resource release while maintaining allocation efficiency.
2Adaptability or versatility
If DCI messages are used for resource allocation, then resource assignment flexibility is improved, but the complexity of managing resource release increases
Solution Approach 1:
The patent applies parameter changes by utilizing existing DCI message fields with specific value combinations to indicate resource release. Instead of introducing new message types or complex release protocols, the invention repurposes existing DCI parameters (such as setting specific bit patterns in resource block assignment or MCS fields) to convey release instructions, thereby maintaining flexibility while reducing complexity through parameter value interpretation.
3Reliability
If resources are held for semi-persistent scheduling, then communication reliability is improved, but network efficiency deteriorates due to idle resource holding
Solution Approach 1:
The patent applies periodic action by implementing a mechanism where semi-persistent resources are automatically released after a predetermined period or condition is met, as indicated by specific DCI field values. This creates a periodic refresh cycle for resource allocation, ensuring that resources are held only as long as needed for reliable communication while automatically returning to the pool for reallocation, thus balancing reliability with network efficiency.
Data Source
AI summary
A method for causing a user agent to release at least one of uplink and downlink semi-persistent communication resources in a mobile communication system, the method comprising the steps of, at the user agent receiving a downlink communication via a physical downlink control channel (PDCCH), using a semi persistent scheduling radio temporary network identifier (SPS-RNTI) assigned to the device to decode a control message on physical downlink control channel (PDCCH) which may include downlink control information (DCI) in a plurality of DCI fields arranged in a DCI format and where the data from the at least one of the DCI fields is identical to a fixed SPS release value, releasing at least one of the uplink and down link semi-persistent communication resources.