MBSFN Area Mapping for Synchronized LTE Transmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In LTE systems, the mapping relation between Multicast Broadcast Single Frequency Network (MBSFN) areas and service areas is not clearly signaled, leading to potential synchronization failures due to differing understandings of control information among eNBs in MBSFN areas.
Innovation Solution
A method and system where the Multicast Coordination Entity (MCE) allocates MBSFN area identities and sends the mapping relation between MBSFN and service areas to the eNB, ensuring synchronized transmission by including MCCH configuration information and cell lists, allowing eNBs to determine and maintain the correct mapping relation for air interface operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If MBSFN area configuration is performed without clear mapping relation signaling, then device complexity is reduced and operation is simplified, but synchronization reliability deteriorates due to differing understandings of control information among eNBs
Solution Approach 1:
The patent applies preliminary action by having the MCE allocate MBSFN area identities and determine the mapping relation between MBSFN areas and service areas before the eNBs perform synchronized transmission. The MCE sends this mapping relation information to the eNBs in advance through M2 interface signaling, ensuring that all eNBs have the correct understanding of control information before synchronization operations begin, thereby preventing synchronization failures.
2Reliability
If detailed mapping relation information is signaled between MBSFN area and service area, then synchronization reliability is improved, but device complexity and information processing burden increase
Solution Approach 1:
The patent uses the MCE as an intermediary between the service area configuration and MBSFN area configuration. The MCE receives service area information from the EPC, determines the mapping relation to MBSFN areas, and then provides this mapping information to eNBs through M2 interface signaling. This intermediary approach centralizes the complex mapping relation determination, simplifying the burden on individual eNBs while ensuring accurate synchronization information is distributed to all necessary nodes.
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The present invention discloses a method and system for determining a mapping relation between the MBSFN area and the service area, wherein the method includes: an eNB sends an M2 setup request message to an MCE; the MCE allocates MBSFN area identities and sends a message with a mapping relation between the MBSFN area and the service area to the eNB; and the eNB acquires the mapping relation between the MBSFN area and the service. By the technical scheme of the invention, the mapping relation between the MBSFN area and the MBMS area can be defined, thus ensuring the synchronization transmission demand of the MBSFN with air interfaces.