MAC Entity Structure for MBMS Data Extraction
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Solution Overview
Problem
The existing multimedia broadcast/multicast service (MBMS) in UMTS networks inefficiently receives and processes data from neighboring cells, leading to unnecessary operations and resource wastage by receiving non-MBMS data, which degrades overall communication efficiency.
Innovation Solution
A method for combining point-to-multipoint service data in a mobile terminal using a medium access control (MAC) entity structure, where data from multiple cells is processed and combined in the MAC layer, discarding non-MBMS data received from neighboring cells to optimize resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the mobile terminal receives and processes all data from neighboring cells, then the coverage and service availability are improved, but the resource consumption and processing overhead increase significantly
Solution Approach 1:
The patent extracts and separates MBMS data from non-MBMS data in the MAC layer. The MAC entity identifies and extracts only the relevant MBMS data packets from the received data stream, discarding non-MBMS data before further processing. This extraction principle resolves the contradiction by maintaining service availability through MBMS data reception while eliminating unnecessary resource consumption associated with processing all received data.
Solution Approach 2:
The patent applies partial action by receiving and processing only a subset of the total data transmitted from neighboring cells - specifically, only the MBMS data portion. Rather than processing all received data (excessive action), the system performs partial processing limited to MBMS data identification, extraction, and forwarding to the upper layer, thereby reducing resource consumption while maintaining service availability.
2Loss of information
If the mobile terminal processes all received data including non-MBMS data, then the data completeness is maintained, but the processing efficiency and communication performance degrade
Solution Approach 1:
The MAC entity extracts only MBMS data from the received data stream, separating it from non-MBMS data. This extraction ensures that relevant MBMS information is preserved and forwarded to the upper layer while non-MBMS data is discarded. The principle resolves the contradiction by maintaining completeness of MBMS data (the relevant information) while eliminating the processing burden of non-MBMS data, thereby improving processing efficiency.
Solution Approach 2:
The patent segments the received data stream into MBMS data and non-MBMS data at the MAC layer. This segmentation allows the system to handle MBMS data separately through dedicated processing paths, ensuring that MBMS information completeness is maintained while non-MBMS data is efficiently discarded. The segmentation principle improves processing efficiency by avoiding the processing of unnecessary data segments.
3Device complexity
If the mobile terminal uses a unified MAC entity for all cells, then the device complexity is reduced, but the ability to selectively process MBMS data from multiple cells deteriorates
Solution Approach 1:
The patent implements a universal MAC entity that can handle both dedicated and common channels from multiple cells. This single MAC entity is designed with multi-functionality to perform MBMS data identification, extraction, and processing for data received from any cell, whether through dedicated or common channels. The universality principle resolves the contradiction by maintaining low device complexity through a unified structure while achieving high adaptability through the MAC entity's ability to selectively process MBMS data from multiple sources.
Solution Approach 2:
The MAC entity employs dynamic processing capabilities to adaptively handle different data types from multiple cells. It dynamically identifies MBMS data packets within the received stream and applies appropriate processing only to those packets, while dynamically discarding non-MBMS data. This dynamic behavior allows the unified MAC entity to maintain selective processing capability without increasing structural complexity.
4Adaptability or versatility
If the mobile terminal combines data from multiple cells at higher layers, then the flexibility in data processing is maintained, but the processing overhead and latency increase
Solution Approach 1:
The patent performs preliminary action by identifying and extracting MBMS data at the MAC layer, before the data reaches higher layers. This advance separation of MBMS data from non-MBMS data reduces the processing burden on upper layers, allowing them to focus only on MBMS data combination and processing. The preliminary action principle resolves the contradiction by maintaining processing flexibility at higher layers while reducing overall processing latency through early MBMS data extraction at the MAC layer.
Data Source
AI summary
The present invention relates to combining point-to-multipoint service data in a mobile terminal of a wireless communication system. A mobile terminal receiving MBMS service data of a current cell in a MAC entity while concurrently receiving the same MBMS service data from a neighboring cell in a MAC entity discards any received data not related to MBMS. Accordingly, any unnecessary operation of the terminal in simultaneously receiving the MBMS service from different cells is minimized. Thus, the mobile terminal effectively receives the MBMS service.