Coordinated Multipoint Codebook for Signaling Overhead Reduction
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Solution Overview
Problem
Current wireless communication networks face challenges in efficiently implementing dynamic coordinated multipoint transmission techniques due to the need for frequent updates in cell reference signal patterns and signaling overheads, which hinder optimal data transmission and decoding by user equipment.
Innovation Solution
A method is introduced to configure user equipment to receive dynamically changing coordinated multipoint transmissions by determining and allocating transmission points, forming a codebook with codepoints that indicate channel state information reference signals, and using semi-static RRC signaling to reduce signaling overheads, allowing for efficient dynamic switching between CoMP schemes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If frequent updates in cell reference signal patterns are implemented to support dynamic CoMP transmission, then transmission flexibility and adaptability are improved, but signaling overhead increases and system complexity worsens
Solution Approach 1:
The patent applies preliminary action by pre-configuring a codebook of reference signal patterns at the user equipment before dynamic CoMP transmission occurs. This allows the UE to have reference signal patterns ready in advance, eliminating the need for frequent signaling updates during dynamic transmission switching, thus reducing signaling overhead while maintaining transmission flexibility
Solution Approach 2:
The patent implements dynamics by enabling the network to dynamically select and indicate specific codepoints from the pre-configured codebook based on current transmission conditions. This allows the system to adapt to changing transmission requirements while the underlying reference signal patterns remain statically configured, balancing flexibility with signaling efficiency
2Adaptability or versatility
If multiple transmission points are allocated to a coordinated multipoint set for diverse transmission schemes, then transmission versatility is improved, but device complexity and configuration difficulty worsen
Solution Approach 1:
The patent applies segmentation by dividing the configuration into two independent parts: a static codebook configuration containing multiple reference signal patterns, and a dynamic codepoint indication selecting the active pattern. This segmentation allows the UE to handle multiple transmission points and schemes without increasing overall configuration complexity, as the complex patterns are pre-segmented into the codebook
Solution Approach 2:
The patent implements universality by designing a unified codebook structure that can accommodate multiple reference signal patterns for different transmission points and CoMP schemes. This single universal codebook serves multiple functions, allowing the system to support diverse transmission schemes without requiring separate configuration mechanisms for each scheme
3Productivity
If dynamic switching between CoMP schemes is enabled, then network operation efficiency is improved, but user equipment processing complexity increases
Solution Approach 1:
The patent reduces UE processing complexity through preliminary action by having the UE pre-compute and store multiple reference signal patterns in the codebook before dynamic switching occurs. This eliminates the need for complex real-time computation during dynamic CoMP scheme switching, allowing efficient network operation with simplified UE processing
Data Source
AI summary
A method of configuring user equipment in a wireless communication network to operate to receive a dynamically changing coordinated multipoint transmission from one or more transmission point in said network, a computer program product and network control node operable to perform that method. The method comprises: determining, for the user equipment, a set of two or more transmission points from which the user equipment may receive a transmission and allocating them to a coordinated multipoint transmission measurement set associated with the user equipment; allocating a set of modes of operation of the transmission points in the coordinated multipoint transmission measurement set for communication with the user equipment; associating a codepoint to each mode in the allocated set of modes of operation of the set of transmission points to form a codebook; and informing the user equipment of the codebook.