EMM Data Transport Procedure Overhead Reduction for Satellite CIoT
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Solution Overview
Problem
Existing 3GPP wireless communication systems face challenges in optimizing data transmission over satellite access, particularly in terms of overhead reduction during attach and tracking area update procedures, which affect the efficiency of EPS Mobility Management (EMM) data transport.
Innovation Solution
A method and system for initiating EMM data transport procedures with reduced overhead, involving the transmission of an EMM transport message that includes a DDX IE indicating no further uplink or downlink data transmission is expected, or only a single downlink transmission, specifically for Cellular Internet of Things (CIOT) EPS optimization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional EMM data transport procedure is used for satellite access, then data transmission can be established, but protocol overhead is excessive reducing transmission efficiency
Solution Approach 1:
The patent extracts and removes unnecessary protocol elements from the traditional EMM data transport procedure. Specifically, it eliminates the need for separate Service Request and ESM Data Transport procedures by integrating data transmission directly into the EMM Transport procedure, thereby reducing protocol overhead and improving transmission efficiency for CIOT devices over satellite access.
2Reliability
If multiple separate procedures (Service Request, ESM Data Transport) are used for data transmission, then data can be transmitted reliably, but procedure complexity increases
Solution Approach 1:
The patent merges multiple separate procedures (Service Request procedure and ESM Data Transport procedure) into a single integrated EMM Transport procedure. This consolidation maintains data transmission reliability while significantly reducing procedure complexity and the number of message exchanges required between UE and network.
3Productivity
If full EMM data transport procedure is executed for CIOT devices, then complete data transmission control is achieved, but overhead reduction is insufficient
Solution Approach 1:
The patent applies partial action by implementing a simplified EMM Transport procedure specifically tailored for CIOT devices over satellite access. Instead of executing the full traditional EMM data transport procedure, it implements only the essential functionality needed for CIOT data transmission, achieving significant overhead reduction while maintaining operational simplicity through the Downlink data expected (DDX) information element.
Data Source
AI summary
According to one embodiment, an operation method of user equipment (UE) may comprise: performing an attach procedure for an Evolved Packet System (EPS) service; transmitting information on a support of control plane Cellular Internet of Things (CIoT) EPS optimization with overhead reduction during the attach procedure or a tracking area update procedure; and if the UE is in a connected mode, for data transfer with reduced overhead over satellite access, initiating an EPS Mobility Management (EMM) data transport procedure. The EMM data transport procedure may include transmitting an EMM transport message. The EMM transport message may include a downlink data expected (DDX) information element (IE). The DDX IE may indicate that no further uplink and no further downlink data transmission subsequent to an uplink data transmission is expected or that only a single downlink data transmission and no further uplink data transmission subsequent to the uplink data transmission is expected.