Scheduling Information Report Triggering in Multi-Carrier Systems
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Solution Overview
Problem
The introduction of the multi-carrier characteristic in the HSUPA system poses challenges in triggering a scheduling information (SI) report, as existing solutions do not effectively manage the multiple carrier states, leading to inefficiencies in resource allocation and data transmission.
Innovation Solution
A method and apparatus are introduced to configure timers for each carrier or all carriers, allowing SI reports to be triggered when preconfigured conditions are met, using timers like T-WAIT and T-SI to manage scheduling grants and resource usage, thereby optimizing SI reporting across multiple carriers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multi-carrier characteristic is introduced in HSUPA system, then uplink peak rate is increased, but scheduling information report triggering becomes complex and inefficient
Solution Approach 1:
The patent segments the SI report triggering mechanism by introducing separate timers (T-WAIT, T-SI) for different triggering conditions and maintaining independent timer states for each carrier. This segmentation allows the system to handle multiple carriers independently while managing SI reporting complexity through structured timer-based control.
2Reliability
If conventional SI report triggering conditions are applied to multi-carrier system, then resource allocation may be inaccurate, but implementing new triggering mechanisms increases system complexity
Solution Approach 1:
The patent implements dynamic timer management where T-WAIT and T-SI timers are started, stopped, or restarted based on real-time carrier states and scheduling conditions. The timer mechanisms adapt dynamically to buffer states, scheduling grant changes, and carrier-specific conditions, enabling accurate resource allocation through state-dependent triggering decisions.
Solution Approach 2:
The system continuously monitors carrier states, buffer conditions, and scheduling grant status to determine whether to start, stop, or restart timers. This feedback mechanism ensures that SI reports are triggered only when appropriate conditions are met across multiple carriers, improving resource allocation accuracy through condition-based decision making.
3Loss of time
If SI report is triggered frequently in multi-carrier system, then resource allocation timeliness is improved, but system resource consumption increases
Solution Approach 1:
The patent employs periodic timer-based triggering where T-SI timer ensures SI reports are sent at regular intervals, and T-WAIT timer provides periodic checks for scheduling conditions. This periodic action guarantees timely resource allocation while controlling resource consumption by limiting reports to specific time intervals rather than continuous monitoring.
4Measurement precision
If multiple timers are maintained for each carrier, then SI reporting accuracy is improved, but device complexity increases
Solution Approach 1:
The patent segments timer management by maintaining separate T-WAIT and T-SI timers for each carrier with independent state tracking. This segmentation enables precise SI reporting accuracy for each carrier while organizing complexity through structured, carrier-specific timer management rather than a monolithic triggering system.
Data Source
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AI summary
The present invention provides methods and apparatus for triggering a SI report in a multi-carrier system, and the method includes: in a multi-carrier system, configuring a first timer in UE corresponding to each carrier assigned to the UE by network side, when a state of one of the carriers meets a preconfigured condition, starting or restarting the first timer corresponding to the carrier, if the first timer expires, triggering a SI report; or configuring a second timer in UE corresponding to all carriers, when a state of one of the carriers meets a preconfigured condition, starting or restarting the second timer, if the second timer expires, triggering a SI report. The apparatus includes a SI report triggering module and at least two first timing modules or one second timing module. The present invention provides technical solutions for triggering the SI report according to states of the carriers when there are multiple different carrier states, and thus the SI report is triggered in the multi-carrier system.