MTC Uplink Data Channel Sub-PRB Resource Allocation
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Solution Overview
Problem
In LTE networks, machine type communication (MTC) terminals face inefficient spectral usage due to excessive bandwidth allocation for uplink data channels, leading to decreased spectral efficiency.
Innovation Solution
Implementing a method for transmitting and receiving uplink data channels in units of sub-Physical Resource Blocks (sub-PRBs) to optimize resource allocation, allowing for more precise and efficient use of bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If typical LTE terminal method is used for MTC terminal uplink data channel, then bandwidth allocation is sufficient, but spectral efficiency decreases due to excessive bandwidth allocation
Solution Approach 1:
The patent divides the Physical Resource Block (PRB) into smaller sub-PRBs (e.g., 2 or 3 subcarriers per sub-PRB instead of the standard 12). This segmentation allows the MTC terminal to allocate only the necessary subcarriers for its low-rate data transmission, avoiding the waste of allocating an entire PRB and thereby improving spectral efficiency.
2Loss of energy
If bandwidth is reduced for MTC terminal, then spectral efficiency improves, but transmission capability is limited
Solution Approach 1:
The patent enables dynamic adjustment of the uplink data channel bandwidth by allowing the MTC terminal to transmit on a configurable number of subcarriers (e.g., 1 to 12 subcarriers) within a PRB. This dynamic configuration allows the system to optimize between spectral efficiency and transmission capability based on actual data transmission needs.
Data Source
AI summary
Provided are a method for transmitting and receiving an uplink data channel (Physical Uplink Shared Channel, PUSCH) for a Machine Type Communication (MTC) terminal in a 3GPP LTE/LTE-A system. The method for transmitting an uplink data channel (PUSCH) by an MTC terminal, may include receiving information relating to uplink data channel resource allocation in units of sub-Physical Resource Blocks (sub-PRBs) from a base station; and transmitting an uplink data channel on the basis of the information relating to uplink data channel resource allocation to the base station.