Dynamic SPS Configuration for V2X Data Transmission
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Solution Overview
Problem
The existing Semi-persistent Scheduling (SPS) method in LTE networks is not suitable for V2X services due to fixed SPS periods and packet sizes, which can change dynamically based on external conditions like location and speed, leading to inefficiencies in data transmission.
Innovation Solution
Implementing a method that allows user equipment to receive and activate multiple SPS configurations from a network device, enabling flexible data transmission based on changing service periods and packet sizes, thereby improving data transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional SPS with fixed period and packet size is used, then control signaling overhead is reduced, but adaptability to dynamic V2X service conditions deteriorates
Solution Approach 1:
The patent implements dynamic SPS configuration where the SPS period and packet size can be adjusted based on service conditions. The network device receives service data with varying periods and packet sizes, then dynamically configures corresponding SPS parameters (spss-Period, spss-PacketSize) to match the actual service requirements, making the originally static SPS mechanism adaptable to dynamic V2X conditions.
Solution Approach 2:
The patent changes the parameters of SPS configuration by introducing multiple configurable parameters including SPS period, packet size, resource allocation, and modulation schemes. The network device selects appropriate parameter combinations from pre-configured options or dynamically determines new parameters to match the service data characteristics, thereby resolving the contradiction between fixed parameters and dynamic service requirements.
2Device complexity
If only one SPS configuration is allocated per UE, then device complexity is reduced, but service data transmission efficiency deteriorates
Solution Approach 1:
The patent segments the SPS configuration into multiple independent configuration sets, each suitable for different service conditions. The network device can allocate multiple SPS configurations to a single UE, allowing the UE to switch between different configurations based on current service requirements. This segmentation enables efficient handling of multiple service types without requiring a completely new scheduling mechanism for each service.
3Ease of operation
If SPS period and packet size are fixed, then scheduling simplicity is maintained, but transmission efficiency for variable services deteriorates
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple SPS parameter sets with different periods and packet sizes before actual service transmission begins. When service data arrives with specific characteristics, the network device can quickly select from the pre-configured options or activate a predetermined configuration, avoiding complex real-time calculations and maintaining scheduling simplicity while adapting to variable service requirements.
Data Source
AI summary
A service data transmission method, user equipment, and a network device are provided. The method includes: determining, by a network device, a control message used to indicate at least two SPS configurations, and sending the control message to user equipment; and receiving, by the user equipment, the control message sent by the network device, and activating the at least two SPS configurations based on the control message, where each of the at least two activated SPS configurations is used to transmit corresponding service data. In embodiments of the present invention, at least two SPS configurations can be simultaneously performed, thereby improving service data transmission efficiency.