UE Identity Paging With Last-Cell Consistency Checks
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Solution Overview
Problem
Paging failures in wireless communication networks, particularly for NB-IoT and MTC devices, are caused by inconsistencies in last cell records and UE states, leading to increased power consumption due to unnecessary WUS detection and decoding of PDCCH.
Innovation Solution
Implementing mechanisms to ensure consistent last cell records and UE states by modifying paging messages and introducing indicators for last cell information and forced operations, such as forced UE context suspend and release, to align UE and core network records.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network sends paging messages with last cell information to NB-IoT and MTC devices, then the paging success rate is improved, but the devices perform unnecessary WUS detection and PDCCH decoding leading to increased power consumption
Solution Approach 1:
The network performs preliminary actions by sending a first paging message with last cell information before the actual paging attempt. This allows the UE to verify consistency between its stored last cell record and the network's record, and only proceed with WUS detection and PDCCH decoding if the records match, thereby avoiding unnecessary power consumption while maintaining high paging success rate
Solution Approach 2:
The invention implements a feedback mechanism where the UE compares the last cell information received in the paging message with its stored last cell record and provides feedback on consistency. This feedback loop enables the network to adjust subsequent paging attempts, ensuring that paging resources are only activated when there is a genuine match, thus resolving the contradiction between reliable paging delivery and energy efficiency
2Reliability
If the network maintains consistent last cell records and UE states through forced operations, then paging reliability is improved, but the complexity of the paging mechanism increases
Solution Approach 1:
The UE autonomously performs the task of comparing last cell information and determining consistency without requiring complex network-controlled procedures. The UE uses its own stored last cell record to verify against the received paging message, making the system self-servicing and minimizing the need for additional complex network elements or procedures
Solution Approach 2:
The invention changes the state parameter of the paging mechanism by introducing a consistency check based on last cell information. Instead of maintaining complex state machines, the system uses a simple parameter comparison (last cell ID match) to determine whether to proceed with paging, thereby improving reliability without significantly increasing complexity
Data Source
AI summary
This disclosure above describes a method and system for reliably delivering and receiving paging message and reducing power consumption. The method includes: sending, by a first network element of a wireless communication network, a first paging message targeting a UE and comprising a first set of paging parameters to a second network element of the wireless communication network; identifying, by the first network element, a paging failure condition associated with the first paging message; and sending, by the first network element, upon the identification of the paging failure condition, a second paging message targeting the UE and comprising a second set of paging parameters different from the first set of paging parameters to the second network element.