Semi-persistent Scheduling for Remote Relay User Equipment

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Solution Overview

Problem

Current radio communication technologies, particularly in cellular networks, face limitations in supporting high data rates and proximity services, and there is a lack of semi-persistent scheduling implementation between remote and relay user equipment, which affects the efficiency of data transmission and power consumption.

Innovation Solution

A semi-persistent scheduling method and apparatus that configures and manages semi-persistent scheduling between remote and relay user equipment through specific interfaces, allowing for periodic allocation of radio resources and reducing control signaling load, thereby enhancing data transmission efficiency and power management.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If dynamic scheduling is used for data transmission between remote UE and relay UE, then resource allocation flexibility is improved, but control signaling load increases

Engineering Contradiction:

Improveresource allocation flexibilityVSAvoidcontrol signaling load

Core Design Contradiction:

Adaptability or versatilityVSLoss of information

Solution Approach 1:

The patent implements semi-persistent scheduling where resources are allocated periodically for a predetermined duration without requiring continuous control signaling. The network device configures scheduling parameters once, and the remote UE and relay UE automatically use these resources at regular intervals, reducing the frequency of control messages while maintaining systematic resource management

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The network device performs preliminary configuration of scheduling parameters including resource blocks, modulation schemes, and time intervals before actual data transmission begins. This advance setup allows the remote UE and relay UE to operate autonomously during the semi-persistent scheduling period without requiring real-time control signaling for each transmission

Inventive Principle:

Principle #10Preliminary action

2Area of stationary object

If multiple repetitions of data transmission are performed for coverage enhancement, then coverage range is improved, but power consumption increases

Engineering Contradiction:

Improvecoverage rangeVSAvoidpower consumption

Core Design Contradiction:

Area of stationary objectVSUse of energy by moving object

Solution Approach 1:

The patent employs periodic transmissions with predetermined intervals rather than continuous retransmissions. The semi-persistent scheduling establishes a rhythm of transmission that provides sufficient coverage enhancement through repeated exposures while incorporating idle periods that allow power management and reduce overall energy consumption compared to aggressive retransmission schemes

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The semi-persistent scheduling maintains continuous resource allocation for the duration of the scheduling period, ensuring that coverage enhancement is achieved through sustained periodic transmissions rather than intermittent retransmissions. This continuous resource availability optimizes the balance between coverage extension and power consumption by eliminating gaps where retransmission would be necessary

Inventive Principle:

Principle #20Continuity of useful action

3Loss of information

If semi-persistent scheduling is implemented between remote UE and relay UE, then signaling overhead is reduced, but scheduling flexibility decreases

Engineering Contradiction:

Improvesignaling overheadVSAvoidscheduling flexibility

Core Design Contradiction:

Loss of informationVSAdaptability or versatility

Solution Approach 1:

The patent introduces dynamic elements within the semi-persistent framework by allowing the network device to reactivate or modify scheduling parameters during the semi-persistent period. The network can send reactivation signaling to adjust resource allocation, change time intervals, or modify modulation schemes based on changing channel conditions or traffic requirements, thereby injecting flexibility into the otherwise static semi-persistent schedule

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system incorporates feedback mechanisms where the network device monitors transmission quality and traffic patterns during semi-persistent scheduling operation. Based on this feedback, the network can send control signaling to reactivate or adjust the semi-persistent scheduling parameters, allowing the system to adapt to changing conditions while maintaining the overall benefits of reduced signaling overhead

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS11343802B2Semi-persistent scheduling method and apparatus

Publication Date: 2022.05.24 XIAN ZHONGXING NEW SOFTWARE

AI summary

Provided are a semi-persistent scheduling method and apparatus. The semi-persistent scheduling method includes receiving, through a first interface, semi-persistent scheduling configuration information sent by a base station, and sending the semi-persistent scheduling configuration information to a remote user equipment through a second interface to indicate that a semi-persistent scheduling mode is used in information transmission between the remote user equipment and the relay user equipment; and receiving, through the first interface, a semi-persistent scheduling signaling sent by the base station and sending the semi-persistent scheduling signaling to the remote user equipment through the second interface to indicate activation or release of a semi-persistent scheduling process between the remote user equipment and the relay user equipment. Semi-persistent scheduling between the remote user equipment and the relay user equipment can be implemented.