Wireless Backhaul Channel Configuration for CCE and MCS Allocation
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Solution Overview
Problem
Existing wireless backhaul systems face challenges in reliably scheduling and demodulating data channel resources for base stations, particularly in ultra-high frequency bands like terahertz, which affect resource efficiency and decoding complexity.
Innovation Solution
A method and apparatus for channel configuration in a wireless backhaul system that allocates data channel resources based on required capacity and channel state, using modulation and coding scheme (MCS) indexes and candidate control channel element (CCE) aggregation levels, minimizing control channel resources while ensuring reliable data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data channel resources are allocated based on required capacity in wireless backhaul systems, then resource allocation efficiency is improved, but control channel scheduling complexity increases
Solution Approach 1:
The patent segments the control channel scheduling process by dividing MCS indexes into multiple sections and assigning different CCE aggregation levels to each section. This segmentation allows the base station to efficiently allocate resources by referencing pre-configured sections rather than performing complex real-time scheduling decisions, thus improving resource allocation efficiency while reducing control channel scheduling complexity.
Solution Approach 2:
The patent applies preliminary action by pre-configuring MCS index sections and their corresponding CCE aggregation levels before actual data transmission. The base station and wireless backhaul nodes exchange configuration information in advance, allowing them to quickly allocate resources based on pre-established mappings rather than performing complex scheduling calculations in real-time.
2Reliability
If CCE aggregation levels are increased to improve control channel reliability, then demodulation reliability is improved, but control channel resource consumption increases
Solution Approach 1:
The patent applies local quality by assigning different CCE aggregation levels to different MCS index sections based on channel conditions. Instead of using a high aggregation level for all transmissions, the system selectively applies higher aggregation levels only to sections requiring enhanced reliability, thus improving demodulation reliability where needed while minimizing overall control channel resource consumption.
Solution Approach 2:
The patent changes the parameter of CCE aggregation level dynamically based on the MCS index section and channel state. By adjusting the aggregation level parameter according to the specific section and channel conditions, the system achieves optimal balance between reliability and resource efficiency, avoiding unnecessary resource consumption while maintaining required reliability levels.
3Adaptability or versatility
If multiple MCS index sections are configured with different CCE aggregation levels, then resource allocation flexibility is improved, but decoding complexity at the receiver increases
Solution Approach 1:
The patent segments the MCS index space into multiple sections, each associated with specific CCE aggregation levels. This segmentation provides resource allocation flexibility by allowing selective application of different aggregation levels to different sections. At the receiver, the wireless backhaul node uses the section information to efficiently identify which aggregation levels to expect, reducing decoding complexity compared to handling all possible aggregation levels uniformly.
Solution Approach 2:
The patent implements feedback mechanisms where the base station and wireless backhaul nodes exchange information about configured MCS index sections and their corresponding CCE aggregation levels. This feedback allows the receiver to anticipate the aggregation levels that will be used, thereby reducing decoding complexity while maintaining the flexibility benefits of multiple sections.
Data Source
AI summary
An operation method of a backhaul station in a wireless backhaul system may include: receiving, from a base station, information on a required capacity of a data channel resource; identifying a channel state of the base station; allocating the data channel resource from an available capacity based on the required capacity and the channel state; and transmitting, to the base station, a message including resource allocation information of the data channel resource.