Clustered MTC UEs in LTE-A for Base Station Load Reduction
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Solution Overview
Problem
In Machine Type Communication (MTC) over Long Term Evolution Advanced (LTE-A), the increasing number of terminals puts a heavy burden on base stations due to limited frequency spectrum resources, necessitating improved resource utilization and reduced operational costs.
Innovation Solution
The method involves dividing MTC User Equipment (UE) into cluster units, where one second UE acts as a cluster head and multiple first UE as cluster members, with data information being sent through a Physical Uplink Shared Channel (PUSCH) to the second UE and then forwarded to an Evolved Node B (eNB), and Data Transmission Grant (DTG) information is sent back to complete data transmission, optimizing resource usage and reducing base station burden.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of MTC terminals is increased to satisfy growing market demand, then market coverage and service capacity are improved, but the burden on base stations becomes increasingly heavy
Solution Approach 1:
The patent divides MTC terminals into clusters with cluster heads and cluster members. Each cluster member communicates with its cluster head rather than directly with the base station, segmenting the communication burden. The cluster head aggregates data from multiple members and forwards it to the base station, effectively distributing the load and reducing the direct burden on the base station while supporting a larger number of terminals.
Solution Approach 2:
The cluster head acts as an intermediary between cluster members and the base station. Instead of each terminal communicating directly with the base station, the cluster head mediates by receiving data from members, processing it locally, and forwarding aggregated information to the base station. This intermediary role reduces the communication overhead and processing burden on the base station.
2Reliability
If direct communication between each UE and eNB is maintained, then communication reliability is ensured, but resource utilization rate decreases under limited frequency spectrum
Solution Approach 1:
The patent merges communication resources by having multiple cluster members share the same uplink resources to communicate with their cluster head. Instead of each UE requiring dedicated resources to the eNB, multiple UEs can simultaneously transmit to their respective cluster heads using shared time-frequency resources. This merging of communication paths improves resource utilization while maintaining reliability through the cluster head relay mechanism.
3Area of stationary object
If base station transmission power is increased to extend coverage, then service range is improved, but interference with existing users increases
Solution Approach 1:
The patent introduces a new communication dimension by establishing short-distance uplink communication between cluster members and cluster heads at the terminal side. This creates an additional communication layer that extends the effective coverage range without requiring increased base station transmission power. The cluster head then forwards aggregated data to the base station, achieving coverage extension while avoiding the interference problem that would result from simply increasing base station power.
Data Source
AI summary
Provided is a method for MTC in LTE-A. The method includes that pieces of MTC UE are divided into at least one cluster unit, each of which includes one piece of second UE as a cluster head and at least one piece of first UE as cluster members, wherein the first UE sends data information to the second UE through a PUSCH; after receiving the data information, the second UE forwards the data information to an eNB; after receiving the data information, the eNB sends DTG information to the first UE so as to complete data information transmission. In the meanwhile, a system and device for MTC communication in LTE-A are provided. Accordingly, the utilization rate of resources is improved when there are limited frequency spectrum resources, the burden of a base station is reduced and interference on uses around is reduced.