MBSFN Subframe Allocation Control for Distinguishing MBMS Resources
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Solution Overview
Problem
Current LTE systems face challenges in effectively distinguishing MBSFN subframes used for multimedia broadcast/multicast services (MBMS) from those used for other purposes, such as relaying or positioning, leading to inefficiencies in resource allocation.
Innovation Solution
A method and apparatus for configuring control information that efficiently distinguishes MBSFN subframes for MBMS by using a bitmap to indicate subframe allocations in radio frame units, considering the least common multiple of periodic patterns, and providing hierarchical control information for radio resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If MBSFN subframes are used for multiple purposes (MBMS, relaying, positioning), then resource utilization is improved, but the ability to distinguish MBMS subframes deteriorates
Solution Approach 1:
The patent segments the control information into multiple fields: a first field indicating MBSFN subframe allocation and a second field indicating MBMS subframe allocation within those MBSFN subframes. This segmentation allows the system to maintain versatile resource usage while providing clear distinction between subframes used for different purposes through separate indicator fields.
2Manufacturing precision
If control information is provided in detail for each subframe, then allocation precision is improved, but information overhead increases
Solution Approach 1:
The patent introduces a hierarchical structure where control information is organized in multiple dimensions: a first dimension (first field) at the radio frame level indicating MBSFN subframe locations, and a second dimension (second field) at the subframe level indicating MBMS allocation within those frames. This multi-dimensional approach provides precise allocation information without requiring exhaustive detailing at every level, thus reducing overall information overhead.
Data Source
AI summary
The present invention relates to an apparatus and a method for constituting control information for at least one subframe allocation pattern for a multi-cast broadcast service. The method compares periods of radio frame units for each of subframe allocation patterns, sets up a unit period in which at least one subframe allocation pattern is repeated, and sets up control information containing subframe information allocated for a multi-cast broadcast service in the unit period set in the previous step. The method of the present invention enables, for example, efficient separation of MBSFN subframe for an MBMS from other MBSFN subframes.