Component Carrier Timing for Low-Power Multi-Carrier Reception
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Solution Overview
Problem
Designing an LTE advanced capable user equipment to handle aggregated spectrum requires a more complex radio receiver architecture, leading to increased power consumption, which is a non-trivial task.
Innovation Solution
Implementing a mechanism where the base station transmits DL data over multiple component carriers, using anchor and non-anchor carriers with a time offset to minimize power consumption on the user equipment by preparing receivers for non-anchor carriers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple component carriers are used to aggregate large bandwidth for high data rates, then data throughput is improved, but power consumption increases due to more complex radio receiver architecture
Solution Approach 1:
The patent segments the radio receiver architecture into an active receiver for anchor carriers and a power-saving receiver for non-anchor carriers. This segmentation allows the system to maintain high data throughput by using multiple component carriers while reducing power consumption by having only the necessary receiver components active at any given time, thus resolving the contradiction between productivity and energy usage.
Solution Approach 2:
The patent implements dynamic receiver configuration where the radio receiver can switch between different operational modes (active and power-saving) based on the current transmission requirements. The system dynamically activates or deactivates receiver components corresponding to specific component carriers, enabling the system to adapt power consumption to actual data throughput needs in real-time.
2Productivity
If receivers for non-anchor carriers are kept active to receive DL data simultaneously, then data throughput is improved, but power consumption increases
Solution Approach 1:
The patent applies preliminary action by introducing a time offset mechanism where the base station waits for a predetermined delay period after notifying the user equipment before transmitting DL data on non-anchor carriers. This time offset allows the receiver to be activated just in time for the data transmission, avoiding the need to keep the receiver continuously active and thus reducing power consumption while still enabling high data throughput when needed.
3Use of energy by moving object
If a time offset is introduced for non-anchor carriers to prepare receivers, then power consumption is reduced, but data transfer time increases
Solution Approach 1:
The patent implements periodic action through the systematic application of time offsets for non-anchor carriers. Instead of a single fixed delay, the system uses a predetermined delay period that is applied consistently across multiple non-anchor carrier transmissions. This periodic timing mechanism ensures that receivers are prepared in advance without causing excessive delays, balancing power savings with acceptable data transfer timing by establishing a rhythm of activation and transmission that optimizes both parameters.
Data Source
AI summary
Mechanisms for efficient transmission of large amount of download data from a base station to a user equipment in a multi-carrier that minimizes power consumption on the user equipment are described. When multiple component carriers are to be used to transmit the download data, the base station informs the user equipment. The base station transmits on the anchor carriers without wait after informing the user equipment and transmits on the non-anchor carriers after waiting a predetermined delay. The predetermined delay provides time to allow the user equipment to activate the receiving resources and be ready to receive the download data over the non-anchor carriers. In this manner, the user equipment can be in a power conservation mode and activate the receiver resources only when needed.