Uplink Component Carrier Selection for SPS and Dynamic Scheduling Conflict
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Solution Overview
Problem
In the context of LTE-A systems with Carrier Aggregation, there is a lack of implementation on how user equipment can transmit data in the same time unit in response to scheduling from the network side when both Semi-Persistent Scheduling (SPS) and dynamic scheduling are involved.
Innovation Solution
A data transmission method where user equipment determines its scheduling for uplink transmission in a time unit, selecting among available uplink component carriers to perform either SPS or dynamic scheduling transmission, or both, based on received signaling from the network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a user equipment is configured with only one set of SPS resources in the LTE system, then the signaling overhead is reduced, but the user equipment cannot transmit data on multiple component carriers simultaneously in LTE-A system
Solution Approach 1:
The patent divides the single SPS resource configuration into multiple carrier-specific SPS resource configurations. Each component carrier has its own SPS configuration, allowing independent control and transmission on different carriers. This segmentation enables the UE to maintain multiple SPS resources across different carriers while managing complexity through carrier-specific management.
Solution Approach 2:
The patent extends the SPS configuration from a single carrier dimension to multiple carrier dimensions. By configuring SPS resources separately for each component carrier, the system adds the carrier dimension to the scheduling framework, enabling simultaneous SPS transmission on multiple carriers without conflicting with the original single-carrier limitation.
2Adaptability or versatility
If the user equipment transmits data according to dynamic scheduling only, then the scheduling flexibility is improved, but the signaling overhead increases and efficiency decreases for regular data patterns
Solution Approach 1:
The patent implements periodic SPS scheduling for regular data patterns, where the network configures periodic transmission resources in advance. This eliminates the need for continuous dynamic scheduling signaling for regular traffic, reducing overhead and improving efficiency while maintaining flexibility for irregular patterns through dynamic scheduling when needed.
3Productivity
If the user equipment receives both SPS and dynamic scheduling signaling in the same sub-frame, then the data transmission opportunities increase, but the conflict resolution becomes complex
Solution Approach 1:
The patent segments the scheduling decision process by carrier. The UE determines SPS transmission for each component carrier independently based on its specific configuration, then combines these decisions with dynamic scheduling decisions. This carrier-specific segmentation simplifies the conflict resolution process compared to a unified approach, as each carrier's scheduling can be handled separately.
Data Source
Figure 1~2
AI summary
A data transmission method, system and device in multi-carrier system, which relate to wireless communication field, are provided for solving the problem, that is, when the scheduling methods for same time unit in the network side of multi-carrier system include Semi-Persistent Scheduling (SPS) and dynamic scheduling at the same time, how the terminal transmits data in said time unit. Before transmitting the uplink data by using the time unit, the terminal determines that the network side schedules the terminal to implement SPS uplink transmission and dynamic scheduling uplink transmission in the time unit by using the uplink component carrier and the number of uplink component carriers which can be used to implement uplink transmission by the terminal is more than one; the terminal selects parts or all of multiple available uplink component carriers, and implements SPS uplink transmission and/or dynamic scheduling uplink transmission in the time unit by using the selected uplink component carriers.