MTC UE Resource Allocation in Single RB for Uplink Multiplexing

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Solution Overview

Problem

In machine type communication (MTC) systems based on 3GPP LTE, MTC UE devices inefficiently support multiple bandwidths, leading to wasteful frequency resource utilization due to their small data transmission rates and high unit costs, especially when a single resource block is allocated to each device, resulting in reduced multiplex capacity and increased power consumption.

Innovation Solution

A method for allocating wireless resources that allows multiple MTC UE devices to share a single resource block by using position information and demodulation reference signals (DMRS) to configure physical uplink shared channels (PUSCH), enabling time or frequency division of resources within the block to increase multiplex capacity and reduce interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a single resource block is allocated to each MTC UE device, then data transmission can be performed, but frequency resource utilization is wasted and multiplex capacity is reduced

Engineering Contradiction:

Improvemultiplex capacityVSAvoidfrequency resource utilization efficiency

Core Design Contradiction:

ProductivityVSLoss of energy

Solution Approach 1:

The patent merges multiple MTC UE transmissions into a single resource block by using different position information (time/frequency positions) and DMRS configurations for each UE. This allows multiple devices to share the same RB simultaneously without interference, directly increasing multiplex capacity while improving frequency resource utilization efficiency.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent segments the single resource block into different time-frequency positions and assigns different position information to multiple MTC UE devices. Each UE is allocated specific resource elements within the RB based on its position information, enabling orthogonal multiplexing of multiple devices within the same RB.

Inventive Principle:

Principle #1Segmentation

2Adaptability or versatility

If MTC UE devices support multiple bandwidths, then communication flexibility is improved, but unit cost and power consumption increase

Engineering Contradiction:

Improvebandwidth support flexibilityVSAvoidpower consumption

Core Design Contradiction:

Adaptability or versatilityVSUse of energy by moving object

Solution Approach 1:

The patent applies local quality by configuring different position information and DMRS parameters for different MTC UE devices based on their specific service requirements and channel conditions. Each UE receives customized configuration within the same RB, allowing the system to adapt to different device needs without requiring each device to support multiple bandwidths, thus reducing power consumption while maintaining flexibility.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS8942083B2Apparatus and method for transmitting uplink data

Publication Date: 2015.01.27 MTH INC

AI summary

Disclosed herein relates to a method of transmitting uplink data to increase multiplex capacity. The method includes allocating, by each of a plurality of machine type communication user equipment (MTC UE), position information within a single resource block (RB), which is used when transmitting uplink data, to the single RB, generating information about a demodulation reference signal (DMRS) used when demodulating the data received from the plurality of MTC UE, and transmitting the position information within the RB and the information about the DMRS to each of the plurality of MTC UE.