Paging Grouping via PDCCH for UE Power Saving
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Solution Overview
Problem
Current wireless communication networks face challenges in providing an effective paging mechanism for power saving, especially in 5G/NR systems, as existing methods are inefficient and fail to reduce unnecessary paging receptions across various conditions.
Innovation Solution
The proposed solution involves a method where paging grouping information and paging group ID information are transmitted via physical downlink control channel (PDCCH), allowing user equipment (UE) to determine whether to decode the physical downlink shared channel (PDSCH) based on the received information, using parameters such as P-RNTI values, time and frequency resources, and DCI bits, thereby optimizing UE power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the legacy paging mechanism is used, then the paging reception is performed, but unnecessary paging receptions occur and power saving efficiency is poor
Solution Approach 1:
The patent segments users into different paging groups based on their paging characteristics (e.g., mobile and non-mobile users, or users with different paging probabilities). Each group is assigned different paging indications through PDCCH, allowing users to selectively decode PDSCH based on their group. This segmentation reduces unnecessary paging receptions for users who don't need detailed paging information, thereby improving power saving efficiency without compromising overall paging reception effectiveness.
Solution Approach 2:
The patent applies different paging indication strategies to different user groups based on their local characteristics. Mobile users receive different paging indications compared to non-mobile users, or users with high paging probability receive different treatments than users with low paging probability. This local differentiation allows each user to optimize their power consumption based on their specific needs, resolving the contradiction between energy saving and paging reception efficiency.
2Loss of energy
If paging grouping information is transmitted via PDCCH, then unnecessary paging receptions are reduced, but the complexity of the paging mechanism increases
Solution Approach 1:
The patent makes the PDCCH serve multiple functions: it not only carries downlink control information but also transmits paging grouping information and paging indications. By multiplexing these functions into a single channel, the patent avoids adding separate channels for paging group identification, thereby limiting the increase in system complexity while still achieving reduced unnecessary paging receptions and improved power saving efficiency.
Solution Approach 2:
The patent utilizes existing PDCCH parameters (such as DCI format, RNTI types, and control information structure) and modifies them to carry paging grouping information. Instead of introducing completely new transmission mechanisms, the patent changes the interpretation and usage of existing parameters, which minimizes the increase in device complexity while achieving the desired power saving benefits.
Data Source
AI summary
Embodiments of the present application are related to a method and apparatus for paging. An exemplary method of the present application includes: receiving paging grouping information associated with physical downlink control channel (PDCCH), receiving paging group identity (ID) information indicated in PDCCH, and determining whether to decode physical downlink shared channel (PDSCH) based on the paging grouping information and the paging group ID information. Embodiments of the present application can improve the legacy paging mechanism and efficiently reduce unnecessary paging receptions, and accordingly save power.