Downlink Control Channel Carrier Allocation in DC-HSUPA
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Solution Overview
Problem
In the DC-HSUPA system, downlink signal overhead and signaling overhead are generated when downlink signals are concentrated on a certain carrier, leading to inefficient resource usage and performance degradation.
Innovation Solution
A method and apparatus for transmitting and receiving control information, where the control information is transmitted on a physical control channel corresponding to either the same carrier or a different carrier than the data, allowing flexible allocation of downlink control channels across multiple carriers to reduce overhead and improve resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If downlink control channels are transmitted on the same carrier as uplink data in DC-HSUPA system, then carrier aggregation functionality is enabled and resource flexibility is improved, but downlink signal overhead and signaling overhead increase
Solution Approach 1:
The patent implements dynamic selection of downlink control channel transmission carriers based on system conditions. The base station can adaptively choose whether to transmit control channels on the same carrier or different carriers, and can dynamically adjust the carrier assignment for control channels based on traffic conditions, channel quality, and resource availability. This dynamic approach enables the system to optimize between carrier aggregation benefits and overhead reduction in real-time.
Solution Approach 2:
The patent applies different transmission strategies to different carriers based on their specific characteristics and conditions. Each carrier can be configured with appropriate control channel transmission parameters independently, allowing the system to optimize resource usage on a per-carrier basis. This localized optimization reduces overall overhead while maintaining the flexibility of carrier aggregation.
2Productivity
If downlink control channels are transmitted on the same carrier as uplink data, then resource utilization flexibility is improved, but signaling overhead increases leading to performance degradation
Solution Approach 1:
The patent segments the downlink control channel transmissions across multiple carriers rather than concentrating all control signaling on a single carrier. By dividing control channel transmissions across different carriers, the system maintains resource utilization flexibility while distributing and reducing the signaling overhead burden on any single carrier, thereby preventing performance degradation.
Solution Approach 2:
The patent introduces an additional dimension to control channel transmission by utilizing the carrier frequency dimension. Instead of transmitting all control channels on one carrier, the system distributes control channels across multiple frequency carriers, effectively using the frequency dimension to reduce overhead and improve resource utilization efficiency.
Data Source
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AI summary
The invention relates to a method for transmitting control information of a base station in a mobile communication system, the method comprising: transmitting first information indicating the downlink carrier for transmitting the control information (505, 508, 511, 514); transmitting the control information on a physical control channel on the downlink carrier indicated by the first information(512), the control information including second information on an uplink carrier for receiving data; and receiving the data on the uplink carrier which is indicated by the second information. The invention also relates to a base station for transmitting control information according that method. Furthermore, the invention relates to a method and terminal for receiving the control information.