Backhaul Control Channel Resource Allocation in OFDM Relay Systems
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently multiplexing control channels with data on backhaul links, leading to resource waste due to time-varying control channel information.
Innovation Solution
A method and apparatus for transmitting and receiving control channels on a backhaul link that adaptively assigns control channel resources without wasting resources, allowing for efficient multiplexing with data channels, even with varying amounts of control channel information, by utilizing a combination of resource block aggregation and interleaving techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If control channel resources are allocated statically in backhaul links, then resource allocation is simple, but resource waste occurs due to time-varying control channel information
Solution Approach 1:
The patent implements dynamic control channel resource allocation where the base station determines the amount of control channel information and allocates resources adaptively based on time-varying conditions. The relay node dynamically receives control channels in the backhaul link according to the allocated resources, enabling the system to adjust resource usage according to actual needs and avoid waste while maintaining allocation simplicity through automated determination.
2Adaptability or versatility
If control channel resources are increased to handle time-varying information, then adaptability improves, but resource efficiency deteriorates
Solution Approach 1:
The patent changes the parameter of control channel resource allocation from fixed to variable based on the amount of control channel information. The base station determines resource allocation dynamically, adjusting the quantity of resources allocated to control channels according to actual information requirements, thereby achieving both adaptability and resource efficiency by matching resource usage to actual needs.
3Productivity
If control channels and data are multiplexed on backhaul links, then resource utilization improves, but interference between channels increases
Solution Approach 1:
The patent segments the backhaul link resources by separating control channel resources from data channel resources through dynamic allocation. The base station determines specific resource allocations for control channels, creating distinct resource regions that reduce interference while maintaining high overall utilization. This segmentation allows control and data channels to coexist efficiently on the same backhaul link.
Data Source
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AI summary
A method and apparatus for transmitting/receiving control channels through a wireless backhaul in an OFDM-based communication system including relay nodes is provided. A method for transmitting a control channel includes arranging control resources for at least one receiver; sorting the control resources and null resources in a control channel region; rearranging the control resources to be distributed and the null resources to be adjacent to the distributed control resources; and mapping the control resources and null resources to the control channel region.