MME Suspend Request for PS Domain Resource Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In mobile communication systems, there is a challenge in seamlessly transitioning a User Equipment (UE) from a Packet Switching (PS) domain to a Circuit Switching (CS) domain for voice call services, leading to issues with suspending packet data services and maintaining registered states, which results in resource wastage and loss of PS session information.
Innovation Solution
A method and apparatus are provided where a Mobile Management Entity (MME) sends a paging message to an evolved Node B (eNB) to switch a UE to the CS domain, and upon confirmation, sends a suspend request to a gateway in the PS domain to suspend packet data services, ensuring the UE maintains a registered state and avoids unnecessary resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE switches from PS domain to CS domain for voice call service, then voice call service is provided, but the PS domain service is not suspended leading to resource wastage
Solution Approach 1:
The MME sends a suspend request message to the gateway in the PS domain before or during the UE's transition to CS domain, proactively suspending packet data services to prevent resource wastage while the UE is engaged in voice call in CS domain
Solution Approach 2:
The eNB sends a report message to the MME indicating that the UE has switched to CS domain, providing feedback that triggers the MME to suspend PS domain services, ensuring resource management is adjusted based on actual UE state
2Reliability
If the UE switches from PS domain to CS domain, then voice call service is received, but the registered state in PS domain is lost
Solution Approach 1:
The MME maintains the registered state of the UE in PS domain by sending suspend request rather than release messages, preserving session information for potential future resumption when UE returns to PS domain
Solution Approach 2:
The system suspends rather than releases PS domain bearers, allowing the UE to discard current PS service usage and recover the registered state information when switching back from CS domain
3Adaptability or versatility
If the MME sends paging message to switch UE to CS domain, then voice call service is enabled, but PS domain service continues running causing resource wastage
Solution Approach 1:
The eNB provides feedback to the MME through a report message confirming the UE has switched to CS domain, enabling the MME to subsequently suspend PS domain services and improve resource utilization based on actual network state
Solution Approach 2:
The MME acts as an intermediary between the eNB and the gateway in PS domain, receiving switching confirmation from eNB and coordinating the suspension of PS services at the gateway to optimize resource allocation
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A method for providing a voice call service to a user equipment, UE, by a mobile management entity, MME, in a mobile communication system is provided, the method comprising: sending, to a base station, a first message for paging to provide the voice call service to the UE; receiving, from the base station, a second message including a cause associated with a domain change from a packet switching, PS, domain to a circuit switching, CS, domain; and sending, to a gateway in the PS domain, a third message for requesting suspension of a bearer to provide a service for the UE.