Wireless Control Channel Allocation via Downlink Information Merging
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Solution Overview
Problem
The increasing volume of signals in wireless communication networks poses a challenge in efficiently transmitting control channels, particularly with the introduction of relay technologies that require efficient methods for downlink and uplink allocation information transmission.
Innovation Solution
A method is introduced where a base station allocates downlink allocation information to a downlink sub-frame, determines whether to include uplink allocation information, and inserts transmission information indicating the presence of uplink allocation information, allowing terminals to effectively decode and determine resource allocation for both downlink and uplink channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If relay technology is introduced to improve data transmission efficiency, then data transmission efficiency is improved, but the number of control channels to be transmitted increases
Solution Approach 1:
The patent combines downlink allocation information and uplink allocation information into a single downlink control information (DCI) message. The base station determines whether to include uplink allocation information in the DCI message based on whether uplink resources need to be allocated, and transmits this combined message to the terminal through the physical downlink control channel (PDCCH), reducing the total number of separate control channels required
Solution Approach 2:
The downlink control information (DCI) message is designed to serve multiple functions: it can contain downlink allocation information, uplink allocation information, or both, depending on the transmission needs. This multi-functional DCI structure allows a single control channel to replace multiple specialized control channels, thereby reducing overall control channel overhead while maintaining relay transmission efficiency
2Loss of information
If multiple control channels are transmitted via downlink sub-frame, then comprehensive control information is provided, but transmission overhead and complexity increase
Solution Approach 1:
The patent merges multiple control channels (downlink allocation and uplink allocation) into a single downlink control information (DCI) message structure. This DCI message can flexibly contain different types of allocation information based on transmission needs, reducing transmission overhead and simplifying the control channel structure while maintaining information completeness
Solution Approach 2:
The DCI message structure is designed to be dynamic, where the base station determines whether to include uplink allocation information in the DCI message based on real-time transmission requirements. This dynamic configuration allows the control information to adapt to different scenarios, maintaining completeness while reducing complexity when full information is not needed
3Reliability
If terminals continuously monitor all control channels, then no allocation information is missed, but power consumption increases
Solution Approach 1:
The patent extracts and transmits only the necessary allocation information in the DCI message based on current transmission needs. When uplink resources are not being allocated, uplink allocation information is excluded from the DCI message. Terminals can detect this absence and avoid unnecessary processing, reducing power consumption while maintaining reliable reception of relevant allocation information
Data Source
AI summary
Provided is a communication system that transmits a control channel using a downlink. The communication system may transmit, to the terminal, transmission information of uplink allocation information that indicates whether uplink allocation information is transmitted using a downlink, and the terminal may determine whether the uplink allocation information is included in a downlink frame, based on the transmission information of uplink allocation information. The base station may transmit, to the terminal, information associated with a resource which has a possibility of being used for transmission of a physical downlink control channel (PDCCH), and the terminal may decode the PDCCH in the resource which has a possibility of being used for transmission of the PDCCH.