System Information Resource Allocation for Coverage Enhancement

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Solution Overview

Problem

In low-coverage environments, existing Machine Type Communication (MTC) systems face challenges in maintaining reliable communication between MTC equipment and base stations due to low data rate requirements and high latency tolerance, necessitating increased repetition of system information transmission to enhance coverage performance.

Innovation Solution

A method is introduced to determine and utilize resources for repeated transmission of system information based on varying coverage enhancement grades, allowing for flexible deployment of resources according to different coverage requirements, ensuring terminals can adaptively detect the required coverage enhancement grade while minimizing system overhead.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the MIB sending frequency is increased to improve coverage performance in low-coverage environments, then coverage performance is improved, but system overhead increases

Engineering Contradiction:
Improvecoverage performanceVSAvoidsystem overhead
Core Design Contradiction:
ReliabilityVSQuantity of substance

Solution Approach 1:

The patent applies local quality by differentiating resource allocation for system information transmission based on coverage enhancement grades. Different cells or terminal groups with different coverage requirements are assigned different repetition counts and resource configurations. This allows terminals in poor coverage areas to receive enhanced transmission resources while terminals in good coverage areas use standard resources, thus improving coverage performance for needy terminals without increasing system overhead uniformly across the entire network.

Inventive Principle:
Principle #3Local quality

2Reliability

If additional equipment such as stations and relays are deployed to maintain communication in low-coverage areas, then communication reliability is improved, but deployment cost increases greatly

Engineering Contradiction:
Improvecommunication reliabilityVSAvoiddeployment cost
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent uses copying by transmitting system information multiple times through repetition in the time domain. Instead of deploying additional physical infrastructure equipment like relay stations or access points in hard-to-reach areas, the system creates temporal copies of the system information blocks and transmits them across multiple subframes and radio frames. This allows terminals in low-coverage areas to accumulate sufficient signal energy through repeated reception and combining, achieving reliable communication without the high capital expenditure of additional hardware deployment.

Inventive Principle:
Principle #26Copying

3Quantity of substance

If the MIB sending period is extended to reduce system overhead, then system overhead is reduced, but coverage performance deteriorates

Engineering Contradiction:
Improvesystem overheadVSAvoidcoverage performance
Core Design Contradiction:
Quantity of substanceVSReliability

Solution Approach 1:

The patent applies dynamics by making the MIB transmission configuration adaptive rather than fixed. The system dynamically adjusts the number of repetitions, resource allocation, and transmission parameters based on the coverage enhancement grade of different terminals or cells. Terminals experiencing poor coverage can request or be assigned higher repetition counts and more frequent transmissions, while terminals in good coverage areas benefit from reduced transmission frequency. This dynamic adaptation allows the system to optimize between overhead reduction and coverage performance improvement based on actual channel conditions.

Inventive Principle:
Principle #15Dynamics

Data Source

PatentUS9986558B2Method for transmitting system information, system and device
Publication Date: 2018.05.29 ZTE CORP
  • US9986558B2 patent drawing
  • US9986558B2 patent drawing
  • US9986558B2 patent drawing

AI summary

The disclosure discloses a method for transmitting system information for transmitting system information, a system and a device. The method includes that: a position of a resource for repeatedly sending the system information for repeatedly sending system information in a transmission period for the system information is determined; and the system information is sent on the resource for repeatedly sending the system information for repeatedly sending system information.