Uplink CoMP DMRS Sequence Configurability for Interference Mitigation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current CoMP technologies face limitations in achieving optimal spectral efficiency and user pairing capability due to interference from different transmission points, particularly in the configurability of DMRS sequences, which restricts the effective operation of uplink CoMP in wireless communication networks.
Innovation Solution
The introduction of UE-specific configurability for DMRS sequences, CSI-RS resource configuration, and dynamic power control parameters allows for the creation of pseudo-orthogonal patterns, enhancing UE pairing capability and supporting efficient uplink CoMP operations by dynamically assigning and updating parameters within the network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If coscheduling capability of Rel-10 specification is used, then coordination of transmissions across multiple eNBs is achieved, but interference among DMRS from different TPs cannot be avoided
Solution Approach 1:
The patent applies local quality by making DMRS sequences UE-specific and TP-specific. Each transmission point assigns different DMRS sequences to different UEs, and different TPs use different sequence configurations. This localized differentiation at the UE and TP level reduces interference while maintaining coordination benefits.
Solution Approach 2:
The patent changes the parameters of DMRS sequences by introducing UE-specific configurability. The network can assign different sequence parameters (such as cyclic shifts, base sequences) to different UEs and TPs dynamically. This parameter differentiation enables pseudo-orthogonal patterns that reduce interference among simultaneous transmissions.
2Adaptability or versatility
If configurability of DMRS sequence is introduced, then UE pairing capability is increased, but system complexity increases
Solution Approach 1:
The patent implements dynamics by making DMRS sequence configuration dynamic rather than static. The network can dynamically assign and reassign DMRS sequence parameters to UEs based on current channel conditions, UE pairing requirements, and TP assignments. This dynamic approach increases adaptability while the network maintains control to manage complexity.
Solution Approach 2:
The patent applies universality by creating a flexible DMRS configuration framework that serves multiple functions: it enables UE pairing, supports CoMP operations, provides interference mitigation, and allows for future extensions. The same configurability mechanism serves multiple purposes, justifying the added complexity through multi-functionality.
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
Disclosed embodiments may include an apparatus having one or more processors coupled to one or more computer-readable storage media. The one or more processors may be configured to transmit and/or receive channel state information reference signal (CSI-RS) resource configuration information, demodulation reference signals (DM-RS), uplink sounding reference signals (SRS), and power control parameters to support uplink coordinated multi-point (CoMP) operations. Other embodiments may be disclosed.