Semi-Persistent V2V Resource Allocation for Periodic LTE Traffic
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Solution Overview
Problem
The limited radio spectrum availability poses a bottleneck for the development of wireless networks, particularly in LTE-Advanced systems, necessitating a solution for wider bandwidth support through carrier aggregation, while existing mechanisms struggle to efficiently allocate resources for predictable traffic patterns and device-to-device proximity services in LTE networks.
Innovation Solution
Implementing semi-persistent resource allocation (SPS) for LTE networks, particularly in the context of carrier aggregation and device-to-device (D2D) communication, to efficiently manage resource allocation for services with predictable traffic patterns, such as VoIP, by configuring persistent resource assignments and managing them through RRC signaling, while allowing dynamic overrides for retransmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dynamic resource allocation is used for each transmission time interval, then resource flexibility is improved, but signaling overhead increases and resource utilization efficiency decreases for periodic traffic
Solution Approach 1:
The patent applies preliminary action by configuring semi-persistent resource allocations in advance for periodic traffic patterns. The eNodeB pre-allocates resources for future transmission intervals based on predicted traffic periodicity, eliminating the need for continuous dynamic scheduling signals. This resolves the contradiction by maintaining resource flexibility through pre-planned allocations while dramatically reducing signaling overhead compared to per-interval dynamic allocation.
Solution Approach 2:
The patent implements periodic action through semi-persistent scheduling where resources are allocated periodically for predictable traffic patterns. Instead of continuous dynamic allocation, the system establishes periodic resource assignments that automatically repeat for the configured duration, reducing signaling overhead while maintaining adaptability for periodic communications such as VoIP or sensor data transmission.
2Productivity
If semi-persistent resource allocation is configured for multiple data components with different periodicities, then resource utilization efficiency is improved, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the periodic data into multiple data components, each with its own transmission periodicity and resource requirements. The eNodeB configures separate semi-persistent resource allocations for each component, allowing independent optimization of resources for each data type. This resolves the contradiction by improving overall resource utilization efficiency through component-specific allocations while managing complexity through systematic configuration of individual components.
Solution Approach 2:
The patent implements universality by creating a multi-functional semi-persistent resource allocation mechanism that can handle multiple data components with different periodicities using a unified configuration framework. The same SPS mechanism serves multiple purposes - accommodating varying periodicities, different data priorities, and multiple transmission requirements through a single configurable system, thereby improving resource efficiency without proportionally increasing device complexity.
3Speed
If carrier aggregation is implemented to support wider bandwidth, then data rate is improved, but resource allocation complexity increases
Solution Approach 1:
The patent applies merging by combining multiple component carriers through carrier aggregation to provide wider bandwidth for semi-persistent resource allocations. The eNodeB aggregates available carriers and allocates SPS resources across the combined bandwidth, achieving higher data rates for periodic traffic. This resolves the contradiction by improving data rate through bandwidth aggregation while managing complexity through unified SPS configuration across the aggregated carriers.
Data Source
AI summary
The invention relates to an improved semi-persistent resource allocation for a mobile terminal (MT) for transmitting periodic data. The MT transmits information on the periodic data to the radio base station (BS), such that the BS determines the different possible transmission periodicities and/or the different possible message sizes of the data components of the periodic data. The MT receives from the BS plural semi-persistent resource (SPS) configurations, each being usable to transmit at least one of the supported data components. The MT indicates to the BS the data components that are to be transmitted by the MT. The MT receives from the BS an activation command to activate one or more of the SPS configurations to periodically allocate radio resources for the MT to transmit each of the indicated data components. The MT then transmits the one or more data components based on the radio resources and the transmission periodicity as configured by the activated one or more SPS configurations.