MBSFN Signal Reception in Wireless Communication Systems
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face inefficiencies when handling multiple carrier types, particularly in signal transmission and reception, subframe configuration, and signaling methods, which limit effective communication performance.
Innovation Solution
A method and apparatus that enable user equipment to efficiently receive downlink signals by processing multicast broadcast single frequency network (MBSFN) signals, utilizing orthogonal frequency division multiplexing (OFDM) symbols, and adapting cyclic prefix (CP) lengths based on carrier types, allowing for flexible subframe configuration and signal reception strategies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a plurality of carrier types are used in a wireless communication system, then communication capacity and service diversity are improved, but system complexity and difficulty in signal processing increase
Solution Approach 1:
The patent segments the downlink subframe into distinct regions: a first region for control channel signals and a second region for MBSFN signals. This segmentation allows the system to handle multiple carrier types by processing control and MBSFN signals in separate, dedicated areas, reducing the complexity of signal management while maintaining high communication capacity through carrier aggregation.
Solution Approach 2:
The patent introduces a new dimension in resource allocation by defining specific subframe structures with designated regions for different signal types. By adding this structural dimension to the time-frequency resource grid, the system can efficiently manage multiple carrier types without proportionally increasing processing complexity, as resources are pre-organized in the time domain.
2Productivity
If MBSFN signals are transmitted in downlink subframes, then broadcast communication efficiency is improved, but control channel signal reception may be compromised
Solution Approach 1:
The downlink subframe is divided into a first region for control channel signals and a second region for MBSFN signals. This spatial segmentation ensures that control channel transmissions and MBSFN signal transmissions do not interfere with each other, allowing both control channel reliability and MBSFN broadcast efficiency to be maintained simultaneously through non-overlapping resource allocation.
3Reliability
If cyclic prefix lengths are adapted based on carrier types, then signal transmission robustness is improved, but configuration complexity increases
Solution Approach 1:
The patent applies different cyclic prefix lengths to different carrier types based on their specific requirements. By making the cyclic prefix configuration local to each carrier type rather than uniform across all carriers, the system achieves optimal signal robustness for each carrier while managing configuration complexity through standardized per-carrier parameters.
Data Source
AI summary
The present invention relates to a wireless communication system. In particular, the present invention relates to a method for a terminal to receive a downlink signal in a wireless communication system and to an apparatus for same, the method comprising the steps of: receiving, from a base station, a first piece of information indicating the start point of a multicast broadcast single frequency network (MBSFN) signal, receiving an MBSFN subframe having a plurality of orthogonal frequency division multiplexing (OFDM) symbols, and receiving the MBSFN signal from an OFDM symbol indicated by the first piece of information in the MBSFN subframe.