5G Paging Slot Offset Scheduling for Lower UE Power Use
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Solution Overview
Problem
In 5G wireless communication systems, unnecessary power consumption occurs in UEs due to the need to receive and buffer PDSCH while processing PDCCH for paging, especially when PDSCH is scheduled in a different slot or when no paging message is scheduled, leading to inefficient power usage.
Innovation Solution
Implementing a method where a base station transmits a new parameter (minK0Paging) indicating a minimum time offset between PDCCH and PDSCH slots, ensuring that paging messages are scheduled at least this offset apart, and adjusting the PDCCH DCI to indicate this offset, allowing UEs to optimize their power consumption by aligning reception times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If PDSCH is scheduled in the same slot as PDCCH for paging transmission, then the paging message can be transmitted quickly, but the UE must receive and buffer PDSCH while processing PDCCH, causing unnecessary power consumption
Solution Approach 1:
The patent segments the paging transmission into two separate time slots: one for PDCCH and another for PDSCH. By introducing a time offset between these channels, the UE can process PDCCH in one slot and only receive PDSCH in subsequent slots when actually needed, avoiding simultaneous reception and buffering operations that waste power.
Solution Approach 2:
The patent applies preliminary action by having the UE process PDCCH first to determine whether a paging message is actually scheduled. Only after confirming the need for PDSCH reception does the UE proceed to receive the data in a later slot. This preliminary check prevents unnecessary PDSCH reception and buffering when no paging message is present.
2Productivity
If PDCCH and PDSCH are scheduled in the same slot, then resource utilization is maximized, but the UE experiences unnecessary power consumption due to required buffering operations
Solution Approach 1:
The patent introduces dynamic scheduling where the time offset between PDCCH and PDSCH can vary. The base station can flexibly adjust the offset based on whether a paging message is actually scheduled, allowing resource utilization to be optimized while avoiding unnecessary buffering operations that would waste energy.
Solution Approach 2:
The patent changes the time parameter (slot offset) between PDCCH and PDSCH scheduling. By adjusting this parameter dynamically, the system achieves better resource utilization when paging is needed while minimizing UE power consumption when paging is not scheduled, eliminating wasteful buffering operations.
3Reliability
If the UE monitors PDCCH and receives PDSCH in every slot, then no paging messages are missed, but power consumption increases due to continuous reception and buffering
Solution Approach 1:
The patent implements periodic action by scheduling PDSCH reception only in specific slots determined by the time offset parameter, rather than requiring continuous monitoring. The UE periodically checks PDCCH and only receives PDSCH in subsequent slots when scheduled, maintaining reliable paging reception while significantly reducing power consumption compared to continuous monitoring.
Data Source
AI summary
The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The method performed by a terminal in a wireless communication system is provided. The method comprises identifying a first value of a time offset between a physical downlink control channel (PDCCH) slot and a physical downlink shared channel (PDSCH) slot; receiving, from a base station, downlink control information (DCI) on a PDCCH associated with a paging, the DCI indicating a second value of the time offset larger than the first value; and receiving, from the base station, a paging message on a PDSCH based on the second value.