Multi-subframe Scheduling for Unlicensed Spectrum Stability
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Solution Overview
Problem
In the License-Assisted Access (LAA) mechanism, using LTE on unlicensed frequency spectrums poses challenges in ensuring user safety and connection stability due to limitations in transmission time and scheduling, particularly with the traditional scheduling methods that do not effectively manage uplink data transmission on unlicensed bands.
Innovation Solution
A multi-subframe scheduling method and device that allows a terminal to receive configuration information from a base station for scheduling data transmission across multiple subframes, using techniques such as detecting specific information domains, scrambling sequences, and Radio Network Temporary Identifiers (RNTIs, to enable efficient data transmission on unlicensed frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional scheduling methods are used on unlicensed frequency spectrums, then the system can operate with simple scheduling mechanisms, but uplink data transmission cannot be effectively managed and scheduling instructions may be lost due to maximum transmission time limitations
Solution Approach 1:
The patent segments the scheduling process into multiple components: configuration information reception, scheduling instruction detection, and data transmission execution across multiple subframes. This segmentation allows the system to manage uplink data transmission more effectively while ensuring scheduling reliability through structured multi-subframe scheduling.
2Loss of energy
If a scheduling instruction schedules data transmission on multiple subframes, then the transmission overhead is reduced and resource utilization is improved, but the complexity of scheduling management increases
Solution Approach 1:
The patent implements multi-subframe scheduling where a single scheduling instruction can schedule data transmission across multiple subframes. This multi-functionality reduces transmission overhead by eliminating the need for separate scheduling instructions for each subframe, while the configuration information provides the necessary framework to manage the complexity.
3Adaptability or versatility
If the LBT mechanism is used to ensure fair share of unlicensed frequency spectrum, then spectrum fairness is improved, but data transmission becomes discontinuous and scheduling becomes more difficult
Solution Approach 1:
The patent applies preliminary action by receiving configuration information before actual data transmission. This configuration information prepares the terminal for multi-subframe scheduling, allowing the system to maintain transmission continuity across subframes even when LBT causes discontinuities. The preliminary configuration enables the terminal to anticipate and adapt to potential LBT interruptions.
Data Source
AI summary
A multi-subframe scheduling method, a device and a terminal are disclosed. The multi-subframe scheduling method includes: receiving configuration information sent by a base station for instructing a terminal to perform multi-subframe scheduling; detecting whether a multi-subframe scheduling instruction sent by the base station is received; when the multi-subframe scheduling signaling is received, sending or receiving data on a plurality of corresponding subframes according to the multi-subframe scheduling signaling and the configuration information. By the technical solution of the present disclosure, data transmission on a plurality of subframes can be scheduled on one subframe, and the multi-subframe scheduling mechanism can be reasonably applied.