Downlink Control Structure for Multi-Carrier Resource Allocation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The use of multiple component carriers in wireless communication systems, such as LTE, leads to wasteful power consumption in mobile stations due to blind decoding of PDCCH across multiple carriers, which is inefficient and consumes unnecessary power.
Innovation Solution
A method where a downlink control structure in a first carrier indicates the location and size of control information on a second carrier, allowing the mobile station to decode the control information without blind decoding, using an extended PDCCH (E-PDCCH) and a primary PDCCH to specify resource allocation and other control-related aspects, thereby reducing power consumption and improving spectral efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If blind decoding of PDCCH is performed in multiple component carriers, then control information can be found, but power consumption increases
Solution Approach 1:
A downlink control structure acts as an intermediary that provides guidance information about the location of control information in a second carrier. This intermediary structure enables the mobile station to avoid blind decoding by directly navigating to the control information position, thereby reducing power consumption while maintaining reliable control information retrieval
2Area of stationary object
If multiple component carriers are aggregated, then bandwidth increases, but device complexity increases
Solution Approach 1:
The control information is segmented across multiple carriers, with a downlink control structure in a first carrier providing guidance to control information in a second carrier. This segmentation allows the system to manage complex multi-carrier operations by dividing control functions across carriers while maintaining organized and manageable structure
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
A mobile station receives a downlink control structure in a first carrier, where the downlink control structure indicates that control information for the mobile station is on a second, different carrier. The mobile station decodes the control information in the second carrier, where the control information specifies resource allocation of a wireless link for the mobile station. More specifically, according to some implementations, the control channel in the first carrier specifies the resource allocation for an extended control channel in the second carrier, where the extended control channel specifies the resource allocation for traffic data of a wireless link for the mobile station.