eDRX Hyper Frame Paging Determination for LTE
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless systems, particularly in LTE, face challenges in determining the specific hyper paging frame and paging occasions for user equipment (UE) configured with extended discontinuous reception (eDRX), which affects paging reliability and power saving, as existing solutions do not adequately address how to identify the hyper paging frame and corresponding paging frames/subframes for potential paging.
Innovation Solution
A method is introduced to determine a specific hyper frame for paging information in a cycle of extended discontinuous reception periods, using a value corresponding to the user equipment's identification and the duration of the extended discontinuous reception period to identify the hyper frame, and calculating the index of the first paging frame and subframe within that hyper frame, allowing for monitoring of consecutive paging frames and subframes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If legacy DRX formula is used for determining paging occasions, then paging reliability is maintained, but power saving is insufficient for extended DRX periods
Solution Approach 1:
The patent segments the extended DRX cycle into multiple hyper paging frames, each containing multiple paging occasions. This segmentation allows the UE to wake up at specific hyper paging frames determined by the extended DRX cycle while maintaining legacy paging occasion calculations within each hyper paging frame, thus achieving both power saving and paging reliability
Solution Approach 2:
The patent introduces a new time dimension by defining hyper paging frames that span multiple legacy paging frames. The UE determines which hyper paging frames to monitor based on extended DRX cycle and hyper frame number, adding a hierarchical structure that enables extended power saving while preserving legacy paging reliability through maintained PF/PO calculations
2Use of energy by moving object
If hyper-SFN based scheme is adopted for extended DRX, then power saving is improved, but determination of specific paging frames and subframes becomes unclear
Solution Approach 1:
The patent introduces hyper paging frames as an intermediary layer between the extended DRX cycle and legacy paging occasions. The UE first determines which hyper paging frames to monitor using extended DRX parameters, then applies legacy PF/PO calculations within each hyper paging frame, simplifying the determination process while achieving extended power saving
Solution Approach 2:
The patent performs preliminary determination of hyper paging frame indices before the UE needs to wake up. By calculating which hyper paging frames contain paging occasions for a given UE ID and extended DRX cycle in advance, the system prepares the paging structure ahead of time, making the actual paging frame determination straightforward when the UE wakes up
3Reliability
If paging occasions are distributed uniformly within cell, then paging reliability is improved, but complexity of determining specific hyper paging frame increases
Solution Approach 1:
The patent establishes a periodic structure where hyper paging frames occur at regular intervals determined by the extended DRX cycle. Within each hyper paging frame, paging occasions are distributed uniformly using modified legacy formulas. This periodicity simplifies the determination process while maintaining uniform distribution for reliable paging reception
Solution Approach 2:
The patent changes the time scale parameter by introducing hyper frames that span multiple legacy radio frames. By modifying the frame number calculation to work with hyper frames while keeping the underlying PF/PO calculation logic based on UE ID and frame indices, the system achieves uniform distribution across extended periods without significantly increasing determination complexity
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A specific hyper frame to be used for paging information in a cycle is determined. The cycle includes multiple eDRX periods, and includes a number of hyper frames. Each of the multiple eDRX periods has a same duration. The determining uses at least a value corresponding to an identification of a UE and the duration to determine the specific hyper frame. An index is determined of a first paging frame and paging subframe, in multiple consecutive paging frames, in the specific hyper frame. One or more of the consecutive paging frames and corresponding paging subframes in the specific hyper frame are monitored by using the determined index of the first paging frame and paging subframe. Apparatus， methods, programs, and computer program products are disclosed.