LTE CoMP Transmission Mode Configuration via RRC Signaling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The current LTE system does not support Coordinated Multi-Point (CoMP) transmission, as it lacks the necessary configuration modes and signaling mechanisms to enable CoMP functionality, limiting its implementation.
Innovation Solution
The method involves extending existing transmission modes in the LTE system to support CoMP by using radio resource control (RRC) signaling to configure CoMP cooperating sets and channel state information feedback, and modifying downlink control signaling formats (DCI formats) to include multi-user information fields, enabling coordinated scheduling/coordinated beamforming and joint processing schemes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional transmission modes (Mode 1-9) are used in LTE Release 8-10, then single-point transmission functionality is supported, but CoMP (coordinated multipoint transmission) cannot be configured or implemented
Solution Approach 1:
The patent extends existing transmission modes (Mode 8 and Mode 9) to support both conventional single-point transmission and CoMP transmission. By making these modes multi-functional, the system can configure CoMP without introducing entirely new transmission mode structures, thus resolving the contradiction between CoMP adaptability and system complexity
Solution Approach 2:
The patent enables dynamic switching between single-point transmission and multi-point CoMP transmission through extended transmission modes. The system can adaptively select between different transmission points and CoMP schemes (JT, FCS, CS/CB) based on channel conditions and user requirements, achieving CoMP configuration capability while maintaining flexible operation
2Adaptability or versatility
If transmission modes are extended to support CoMP with multi-point transmission, then CoMP functionality is enabled, but downlink control signaling formats must be modified to include multi-user information fields
Solution Approach 1:
The patent segments the downlink control information (DCI) by introducing specific DCI formats (2B, 2C, 2D) for different CoMP transmission modes. Each DCI format is tailored to specific CoMP schemes (JT, FCS, CS/CB), allowing controlled complexity management while supporting multi-point transmission functionality
Solution Approach 2:
The patent modifies existing DCI formats by adding or modifying specific parameters such as multi-user information fields, precoding information fields, and resource allocation fields. These parameter changes enable CoMP functionality while maintaining compatibility with existing LTE control signaling structures, balancing functionality enhancement with complexity control
Data Source
Figure 1~2
AI summary
Provided is a method for configuring coordinated multipoint transmission (CoMP) of the present invention. The method includes: providing a transmission mode to support CoMP and, at a base station (eNB), configuring the transmission mode to support CoMP to a user terminal (UE) by radio resource control (RRC) signaling. According to the method of the present invention, it becomes possible to configure CoMP so that the LTE system can support the CoMP function.