LTE-A Carrier Aggregation Control Information Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In the LTE-A system, efficiently controlling communication while improving communication speed with aggregated carriers is challenging due to the lack of clear identification of control information related to radio communication between base stations and user equipment, especially when using component carriers or aggregated carriers.
Innovation Solution
The solution involves transmitting control information related to radio communication between base stations and user equipment in a way that physical information of the corresponding component carriers is identifiable, allowing for efficient communication control by ensuring that each transport block is transmitted per component carrier and control information is mapped correctly to identify the component carrier.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If aggregated carriers are used to improve communication speed, then data transmission rate is improved, but control information identification becomes difficult
Solution Approach 1:
The patent segments control information into two distinct types: downlink control information (DCI) for downlink component carriers and uplink control information (UCI) for uplink component carriers. Each type is transmitted on its designated component carrier type, preventing confusion and enabling clear identification even when multiple carriers are aggregated. This segmentation resolves the identification difficulty by ensuring control information is never mixed across carrier types.
Solution Approach 2:
The patent introduces a mediator mechanism where the base station schedules and transmits control information on specific component carriers based on carrier type. The user equipment similarly schedules transmission of control information on appropriate component carriers. This intermediary scheduling mechanism ensures that control information is systematically organized and clearly identified, preventing loss of information while maintaining high-speed data transmission through carrier aggregation.
2Productivity
If multiple component carriers are aggregated, then communication capacity is improved, but system complexity increases
Solution Approach 1:
The patent divides the aggregated carrier system into distinct downlink and uplink component carrier groups. Each group operates with its own control information transmission rules and scheduling mechanisms. This segmentation simplifies the overall system management by creating clear boundaries and independent control planes for each carrier type, reducing the complexity burden of managing multiple carriers while maintaining high communication capacity.
3Productivity
If control information is transmitted without clear identification, then transmission efficiency is improved, but communication control accuracy deteriorates
Solution Approach 1:
The patent applies local quality by assigning specific transmission characteristics to control information based on its type and target component carrier. Downlink control information is transmitted with characteristics optimized for downlink control, while uplink control information uses characteristics optimized for uplink control. This localized optimization ensures both high transmission efficiency and accurate communication control by tailoring the transmission approach to the specific requirements of each control information type.
Data Source
AI summary
In a mobile communication system according to the present invention, with the separate use of a plurality of component carriers or with the use of a carrier set including the plurality of component carriers aggregated, a base station performs radio communication with a user equipment corresponding to the component carrier or a user equipment corresponding to the aggregated carriers. In particular, in a case where the base station performs radio communication with the user equipment corresponding to the aggregated carriers with the use of the aggregated carriers, each of a plurality of transport blocks created by dividing a transport channel is transmitted per each of the plurality of component carriers constituting the aggregated carriers, and control information related to radio communication between the base station and the user equipment corresponding to the aggregated carriers is transmitted such that physical information of the corresponding component carrier is identifiable. Accordingly, communication control is performed efficiently while improving a communication speed correspondingly to the aggregated carriers.