CoMP UE Resource Determination via Control Information
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Solution Overview
Problem
In CoMP wireless communication systems, user equipment (UE) faces challenges in accurately determining the wireless resources used for data transmission across different cells, leading to potential failure in data decoding due to lack of information about available resources.
Innovation Solution
The method involves a centralized controller transmitting specific information, such as CRS configuration, MBSFN subframe details, and PDSCH starting OFDM symbol information, to the UE using control channels like PDCCH or E-PDCCH, allowing the UE to determine the wireless resources used for PDSCH reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If CoMP transmission scheme is used to improve data transmission capability, then system capacity is improved, but UE cannot accurately determine wireless resources leading to decoding failure
Solution Approach 1:
The patent introduces control information as an intermediary element that carries resource allocation details from the eNB to the UE. This control information acts as a mediator that bridges the gap between the CoMP transmission system and the UE's resource determination capability, enabling accurate identification of wireless resources without compromising system capacity
Solution Approach 2:
The patent implements a feedback mechanism where the eNB provides control information containing resource allocation details to the UE. This feedback loop ensures that the UE receives updated information about wireless resources used in CoMP transmission, allowing accurate resource determination and successful data decoding while maintaining high system capacity
2Measurement precision
If centralized controller transmits detailed resource information to UE, then resource determination accuracy is improved, but control channel overhead increases
Solution Approach 1:
The patent extracts only the essential resource allocation information from the complete CoMP transmission parameters and transmits only these critical details through the control channel. By extracting and transmitting only the necessary control information rather than all possible parameters, the system achieves accurate resource determination while minimizing control channel overhead
Solution Approach 2:
The patent segments the resource information into specific control elements (such as resource indicator fields) that can be transmitted efficiently through the control channel. This segmentation allows the system to convey detailed resource allocation information in a structured, space-efficient manner, improving determination accuracy without proportionally increasing overhead
Data Source
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AI summary
A User Equipment (UE) in a wireless communication system using a Coordinated Multi-Point transmission/reception (CoMP) scheme receives Downlink Control Information (DCI) including CoMP control information, determines a starting position of a data channel on wireless resources, based on starting position information of a data channel included in the CoMP control information and used in each of a plurality of cells, and receives data from the plurality of cells starting from the determined starting position.