Multi-User Control Channel Multiplexing in Data Region
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Solution Overview
Problem
Wireless communication systems using multiple antennas face limitations in control channel resources, which restrict system capacity due to high control channel overhead.
Innovation Solution
Implementing a space division multiplexing technique to transmit and receive multi-user control channels within the data channel region, allowing control channels to be mapped and multiplexed with data channels, thereby expanding control channel resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If control channels are transmitted using traditional methods in the control channel region, then control channel transmission is simple and reliable, but control channel overhead is high and system capacity is limited
Solution Approach 1:
The patent merges control channel transmission with data channel transmission by multiplexing control channels into the data channel region. This allows control information to be transmitted alongside data channels, eliminating the need for separate control channel resources and thereby reducing control channel overhead while increasing system capacity.
Solution Approach 2:
The patent transitions control channel transmission from the traditional control channel region to the data channel region, utilizing spatial dimensionality change. By mapping control channels to resource blocks in the data channel region and using multiple antennas for spatial multiplexing, the system achieves more efficient resource utilization and reduces overhead.
2Adaptability or versatility
If control channel resources are increased to support more users, then multi-user service capability is improved, but control channel overhead increases and resource allocation efficiency decreases
Solution Approach 1:
The patent makes the data channel region serve dual purposes: carrying both data channels and control channels. This universalization allows the same resource blocks to be used for multiple functions, enabling the system to support more users without increasing overall overhead, as control channels share the resources with data channels.
Solution Approach 2:
The patent implements dynamic control channel mapping where control channels are allocated to specific resource blocks in the data channel region based on channel conditions and user requirements. This dynamic allocation allows flexible adaptation to different multi-user scenarios while maintaining efficient resource utilization through spatial multiplexing.
3Quantity of substance
If space division multiplexing is used to transmit control channels in the data channel region, then control channel resources are expanded and overhead is reduced, but system complexity increases
Solution Approach 1:
The patent segments the data channel region into multiple resource blocks that can be independently mapped to different control channels. This segmentation allows flexible allocation of control channel resources across different spatial and frequency dimensions, enabling expanded control channel capacity while managing complexity through structured resource block management.
Solution Approach 2:
The patent introduces resource blocks as intermediary units that mediate between control channel transmission and data channel resources. By using resource blocks as the mapping unit in the data channel region, the system achieves flexible control channel allocation while simplifying the overall structure through standardized resource block management and mapping procedures.
Data Source
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AI summary
Provided are a method and apparatus for transmitting and receiving multi-user control channels through a data channel region in a wireless communication system using multiple antennas. Further provided is a definition of a new search space for control channel candidates. In the transmitting method, a base station forms control channels for a plurality of user equipment each of which is composed of at least one resource block, performs a mapping for the control channels by dividing a space of the same transmission region in a data channel region of a sub-frame, and then multiplexes the control channels with data channels in the data channel region of the sub-frame and to transmit the multiplexed control channels.