UE Downlink Signal Reception in CoMP Wireless Systems

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Solution Overview

Problem

In wireless communication systems, particularly in LTE, there is a need for efficient downlink signal reception by user equipment (UE) in scenarios where coordinated multi-point transmission and reception (CoMP) dynamically change radio resources, posing challenges in maintaining effective communication due to varying traffic states and channel conditions.

Innovation Solution

The method involves a UE receiving monitoring information about neighboring cells operating under different uplink-downlink (UL-DL) configurations from a serving cell, allowing it to detect control information and adjust radio resources accordingly, with the ability to change configurations based on predetermined specific UL-DL settings, thereby optimizing radio resource use during CoMP operations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If CoMP dynamically changes radio resources based on traffic states, then communication efficiency is improved, but the complexity of detecting and measuring control information increases

Engineering Contradiction:
Improvecommunication efficiencyVSAvoidcontrol information detection complexity
Core Design Contradiction:
ProductivityVSDifficulty of detecting and measuring

Solution Approach 1:

The patent applies preliminary action by having the UE receive and store UL-DL configuration information from the serving cell before the actual CoMP operation. This pre-configured information includes timing details and resource allocation patterns that the UE needs to detect control information from neighboring cells. By preparing this configuration information in advance, the UE can efficiently detect and measure control information without real-time complexity, thus resolving the contradiction between dynamic resource changes and detection difficulty.

Inventive Principle:
Principle #10Preliminary action

2Adaptability or versatility

If multiple UL-DL configurations are used in CoMP, then adaptability to traffic states is improved, but the device complexity increases

Engineering Contradiction:
Improveadaptability to traffic statesVSAvoidUE configuration complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies universality by having the serving cell transmit UL-DL configuration information that serves multiple functions: it provides timing information for control information detection, specifies resource allocation patterns, and enables the UE to handle multiple neighboring cells with different configurations. This multi-functional configuration information reduces the need for separate handling mechanisms for each configuration type, thereby reducing UE complexity while maintaining high adaptability to varying traffic states and CoMP scenarios.

Inventive Principle:
Principle #6Universality (Multi-functionality)

3Productivity

If dynamic UL-DL configuration changes are implemented, then communication performance is improved, but loss of time for configuration switching increases

Engineering Contradiction:
Improvecommunication performanceVSAvoidconfiguration switching time
Core Design Contradiction:
ProductivityVSLoss of time

Solution Approach 1:

The patent applies preliminary action by pre-transmitting and pre-storing UL-DL configuration information from the serving cell before the UE needs to detect control information from neighboring cells. This configuration information includes all necessary timing details and resource patterns in advance, eliminating the need for real-time configuration negotiation and switching. As a result, the UE can quickly adapt to different CoMP scenarios without time-consuming configuration exchanges, thus reducing configuration switching time while maintaining communication performance improvements.

Inventive Principle:
Principle #10Preliminary action

Data Source

PatentUS9775144B2Method for terminal receiving downlink signal in wireless communication system and apparatus for same
Publication Date: 2017.09.26 LG ELECTRONICS INC
  • US9775144B2 patent drawing
  • US9775144B2 patent drawing
  • US9775144B2 patent drawing

AI summary

The present invention relates to a method for receiving a downlink signal in a wireless communication system and an apparatus for same. More specifically, a method for a terminal receiving the downlink signal in the wireless communication system supporting a coordinated multi-point (CoMP) action comprises the steps of: receiving from a serving cell which operates according to a first uplink-downlink setting monitoring information with respect to an adjacent cell which operates according to a second uplink-downlink setting; and detecting control information of the adjacent cell based on the monitoring information, wherein the first uplink-downlink setting and/or the second uplink-downlink setting is a setting established by changing a portion of a wireless resource according to a specific predetermined uplink-downlink setting.