Network Node PLMN Information Provision for MBMS Reception
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Solution Overview
Problem
Current wireless communication systems face challenges in inter-Public Land Mobile Network (PLMN) MBMS reception, leading to increased latency due to the need for UE to perform PLMN/frequency/cell search and read SIB15 from a non-serving PLMN, which is not feasible across different PLMNs, limiting efficient inter-PLMN MBMS communication.
Innovation Solution
A method where a network node obtains PLMN information related to multiple PLMNs and provides this information to terminal devices, allowing them to prepare for MBMS reception from non-serving PLMNs, thereby reducing the need for frequent searches and minimizing latency by pre-identifying SAIs and frequencies across different PLMNs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UE performs PLMN/frequency/cell search and reads SIB15 from non-serving PLMN for inter-PLMN MBMS reception, then MBMS reception capability is achieved, but latency increases and system complexity increases
Solution Approach 1:
The network node performs preliminary actions by obtaining and providing PLMN information (including SAI and frequency data) to the terminal device before the device needs to perform MBMS reception. This allows the terminal device to skip the time-consuming PLMN/frequency/cell search process and directly prepare for MBMS reception on the correct frequencies, thereby reducing latency while maintaining reception capability.
Solution Approach 2:
The network node acts as an intermediary that bridges the terminal device and non-serving PLMN resources. Instead of the terminal device directly searching and reading SIB15 from non-serving PLMNs, the network node retrieves and forwards the necessary PLMN information (SAI, frequency data) to the terminal device, simplifying the process and reducing the terminal device's operational complexity and latency.
2Reliability
If UE performs PLMN/frequency/cell search and reads SIB15 from non-serving PLMN, then MBMS reception is enabled, but device complexity and operational complexity increase
Solution Approach 1:
The network node serves as an intermediary that handles the complex tasks of obtaining and processing PLMN information from multiple non-serving PLMNs. It consolidates this information (including SAI and frequency data) and provides it to the terminal device in a ready-to-use format, thereby reducing the device's operational complexity while ensuring reliable inter-PLMN MBMS reception capability.
Solution Approach 2:
The network node performs the complex information gathering and processing operations in advance, obtaining PLMN information from multiple non-serving PLMNs before the terminal device needs it. This preliminary action eliminates the need for the terminal device to perform complex search and read operations, reducing device complexity while maintaining full MBMS reception capability.
3Productivity
If network provides PLMN information for multiple PLMNs to terminal device, then latency is reduced and efficiency improves, but network node complexity increases
Solution Approach 1:
The network node performs preliminary information gathering by obtaining PLMN data (including SAI and frequency information) from multiple non-serving PLMNs in advance. This upfront effort, while increasing network node complexity, enables the terminal device to quickly prepare for MBMS reception without latency-inducing searches, thereby improving overall MBMS reception efficiency and productivity.
Solution Approach 2:
The network node acts as an intermediary that centralizes the complexity of managing PLMN information from multiple networks. By consolidating this information processing function at the network node level, the system achieves improved MBMS reception efficiency at the terminal device side, trading network node complexity for overall system productivity.
Data Source
AI summary
Embodiments of the present disclosure provide methods, apparatuses and computer programs for facilitating MBMS reception. There is provided a method performed by a network node. The method comprises obtaining, for a terminal device served by a PLMN, PLMN information related to one or more PLMNs and providing the PLMN information to the terminal device, which can prepare for reception of MBMS from a PLMN other than the serving PLMN among the one or more PLMNs based on the PLMN information. The one or more PLMNs comprise at least one PLMN other than the PLMN serving the terminal device. With embodiments of the present disclosure, performance of MBMS reception can be improved.