MBMS Carrier Indexing for Multicast Service Reception
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Solution Overview
Problem
Current mobile communication systems lack a method to detect and provide carrier information for various types of terminals receiving multicast/broadcast services, especially when multiple carriers are involved, limiting the ability to ensure all terminals can receive MBMS services effectively.
Innovation Solution
A method for receiving MBMS services from a base station supporting multiple carriers, which involves receiving system information, MBMS control information, and transmitting MBMS services based on this information, including determining if a terminal can receive a selected carrier and requesting a carrier change if necessary, using messages like the M2Setup request or eNB configuration update messages, and assigning carrier indices for each MBSFN area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If carrier aggregation function is applied using several carriers for broadband mobile communication, then system bandwidth and data transmission capacity are improved, but the complexity of managing and detecting carrier information for various terminals increases
Solution Approach 1:
The patent segments carrier information management by introducing MBSFN area-level carrier index information. Instead of managing all carrier details centrally, the system divides carrier information into MBSFN area-specific segments, where each area has its own carrier index that terminals can efficiently detect and use for MBMS service reception.
Solution Approach 2:
The patent adds a new dimension to carrier information management by introducing carrier index information at the MBSFN area level. This dimensional addition allows terminals to identify and access carriers through area-based indexing rather than requiring comprehensive carrier aggregation configuration details, simplifying the information hierarchy.
2Adaptability or versatility
If all carriers are provided for MBMS service to ensure all terminals can receive multicast/broadcast, then service coverage and accessibility are improved, but the difficulty of detecting and providing carrier information increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring and broadcasting MBSFN area carrier index information through system information blocks before terminals need to receive MBMS services. This allows terminals to proactively acquire carrier information without requiring complex real-time detection or base station interactions.
Solution Approach 2:
The patent introduces MBSFN area carrier index information as an intermediary between the base station's carrier aggregation configuration and terminal reception capabilities. This intermediary layer simplifies the information exchange by providing area-level carrier identifiers that terminals can use without needing to understand the full carrier aggregation structure.
3Reliability
If carrier aggregation is implemented for unicast services, then service performance and bandwidth are improved, but the lack of terminal capability detection method for MBMS services creates a gap in optimized service delivery
Solution Approach 1:
The patent enables terminals to self-determine their carrier reception capability through the broadcast MBSFN area carrier index information. Terminals can autonomously assess whether they can receive carriers in their current area and request carrier changes if needed, without requiring base station detection or capability reporting mechanisms.
Data Source
AI summary
Disclosed is a method for receiving MBMS services from a base station supporting multi-carriers, including: receiving first system information including information on all the carriers; receiving second system information including information on multi-carriers supported by the base station; receiving MBMS control information through an MBMS control channel; and receiving the MBMS services through an MBMS transmission channel based on the MBMS control information.