MBSFN Subframe Allocation for Wireless Resource Efficiency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, MBSFN subframes scheduled through MSI are always used only for transmission of the corresponding MTCH, leading to inefficient use of wireless resources as some allocated subframes may not be utilized during specific time periods when various data rates are supported for MBMS, resulting in underutilization of wireless resources.
Innovation Solution
A method where User Equipment (UE) receives control information with a specific identifier indicating that a plurality of multiplexed channels are not transmitted during a specific time interval, allowing the UE to receive alternative channels like DTCH or DCCH during that time, and the base station transmits control information with a field indicating the specific identifier and time interval, enabling efficient resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If MBSFN subframes are always allocated for transmission of corresponding MTCH, then the transmission of multicast traffic is ensured, but wireless resources are not efficiently utilized when multicast traffic is not transmitted
Solution Approach 1:
The patent introduces dynamic subframe allocation where MBSFN subframes can be flexibly assigned to different purposes based on traffic conditions. The base station can dynamically indicate through control information whether a previously allocated MBSFN subframe should be used for MTCH transmission or repurposed for other channels, making the resource allocation adaptive to actual transmission needs rather than static.
Solution Approach 2:
The patent enables MBSFN subframes to serve multiple functions: they can be used for MTCH transmission when multicast traffic is active, or repurposed for other channels (indicated by setting all bits to 0) when multicast traffic is not transmitted. This multi-functionality allows the same time-frequency resources to be flexibly allocated to different services based on instantaneous requirements, improving overall resource utilization.
2Adaptability or versatility
If control information is transmitted to indicate subframe allocation, then resource allocation flexibility is improved, but control signaling overhead increases
Solution Approach 1:
The patent uses a compact control information format where a field of N bits (where N is less than or equal to the number of MBSFN subframes) is used to indicate the allocation status of multiple subframes. By changing the parameter representation from individual subframe indicators to a compressed bit field, the patent achieves flexible subframe allocation while minimizing control signaling overhead. The base station can indicate whether each MBSFN subframe should be used for MTCH or repurposed by setting corresponding bits, providing fine-grained control with minimal overhead.
Data Source
AI summary
A method and apparatus for transmitting and receiving control information in a wireless communication system are provided. In a method for receiving control information of a plurality of multiplexed channels by a User Equipment (UE) in a wireless communication system, the UE receives first control information including a first field indicating a specific identifier from a base station, wherein the plurality of multiplexed channels are not transmitted during a specific time interval based on the specific identifier.