LTE eMBMS Service Availability Determination via SAI Blacklisting
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Solution Overview
Problem
Current LTE technologies face challenges in efficiently managing multimedia broadcast multicast services, particularly in determining the availability of eMBMS services across different frequency bands, leading to issues like continuous loop errors and ping-pong effects during cell reselection, which negatively impact user experience.
Innovation Solution
The method involves receiving system information blocks, correlating user service descriptions with service area identities, and determining the availability of eMBMS services by analyzing Temporary Mobile Group Identities and service area identities, thereby avoiding unnecessary cell reselections and improving service activation processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE performs cell reselection based on SAI list information, then the UE can discover available eMBMS services, but continuous loop errors and ping-pong effects occur during cell reselection
Solution Approach 1:
The patent applies preliminary action by having the UE determine service availability before initiating cell reselection. The service layer determines whether a serving cell can provide a requested eMBMS service by correlating USD with SIB15 information and checking TMGI availability, so that cell reselection is only initiated when service availability is confirmed, preventing continuous loop errors and ping-pong effects.
2Productivity
If the UE requests eMBMS service activation without checking serving cell capability first, then service activation can be initiated, but resource waste occurs due to unsuccessful activations
Solution Approach 1:
The patent applies preliminary action by having the service layer determine serving cell capability before initiating service activation. The UE checks whether the serving cell can provide the requested eMBMS service by correlating USD with SIB15 and verifying TMGI availability, so that activation requests are only sent when service availability is confirmed, preventing resource waste and unsuccessful activations.
3Ease of operation
If the UE uses basic cell reselection procedures without service availability checking, then cell reselection is simple, but user experience deteriorates due to service unavailability
Solution Approach 1:
The patent applies preliminary action by having the service layer determine service availability before cell reselection is finalized. The UE checks TMGI availability and correlates USD with SIB15 information to confirm service can be provided, ensuring reliable service availability while maintaining straightforward cell reselection procedures.
Data Source
AI summary
A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus receives a request to receive a Multimedia Broadcast Multicast Service (MBMS) service associated with a service area identity (SAI) and a second frequency. The apparatus performs inter-frequency cell reselection from a first cell transmitting at a first frequency to a second cell transmitting at the second frequency, the second cell being an inter-frequency neighbor cell to the first cell. The apparatus receives system information from the second cell. The apparatus determines that the second cell transmitting at the second frequency is unassociated with the SAI based on the received system information. The apparatus blacklists the SAI on the second frequency in a blacklist for at least a period of time upon determining that the second cell is unassociated with the SAI.