Backhaul Link Control Channel Resource Allocation in LTE-A
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Solution Overview
Problem
The current LTE-A system lacks a specific scheme for controlling resource allocation when CSI-RS and DM-RS exist in the R-PDCCH, leading to inefficiencies in backhaul link control channel information transmission.
Innovation Solution
A method for configuring Resource Element Groups (REGs) in OFDM symbols, where remaining REs not occupied by CSI-RS and DM-RS are utilized to transmit or discard backhaul link control channel information, by forming REGs from neighboring OFDM symbols or adjusting REs within physical resource blocks to accommodate both simple and flexible resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If remaining REs not occupied by CSI-RS and DM-RS are utilized to form REGs for transmitting backhaul link control channel information, then resource utilization efficiency is improved, but system complexity increases due to flexible configuration requirements
Solution Approach 1:
The patent implements dynamic resource element group configuration by allowing the network to flexibly determine whether to use remaining REs for R-PDCCH transmission based on actual system conditions. The configuration can be adapted according to the number of available REs, CSI-RS/DM-RS positions, and traffic requirements, transforming a static resource allocation scheme into a dynamic one that optimizes resource utilization while managing complexity through controlled flexibility.
Solution Approach 2:
The patent changes the parameter of resource element configuration from fixed to variable by introducing configurable parameters such as the number of REs per REG, the selection of neighboring OFDM symbols, and the decision to use or discard remaining REs. These parameter changes enable the system to adapt resource allocation to different scenarios, improving productivity while the parameterization itself provides a structured way to manage the associated complexity.
2Adaptability or versatility
If REs are configured flexibly according to real system demands, then adaptability is improved, but specification complexity increases
Solution Approach 1:
The patent segments the resource allocation process into distinct configurable components: identification of remaining REs, formation of REGs from these REs, selection of neighboring OFDM symbols, and decision-making on whether to use or discard REGs. This segmentation allows each aspect to be configured independently according to system demands, improving adaptability while reducing specification complexity by breaking down the overall configuration into manageable, modular elements with clear rules for each.
3Adaptability or versatility
If neighboring OFDM symbols are combined to form REGs, then resource allocation flexibility is improved, but processing complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-identifying and pre-configuring REGs from remaining REs in neighboring OFDM symbols before actual R-PDCCH transmission. The network determines the configuration of REGs across multiple OFDM symbols in advance, preparing the resource structure beforehand. This preliminary configuration reduces processing complexity during transmission by having the resource allocation decisions made beforehand, while still maintaining the flexibility benefits of multi-symbol REG formation.
Data Source
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AI summary
The present invention discloses a method and device for resource allocation of backhaul link control channel information. Upon application of technical solution proposed by embodiment of this invention and based on the condition of introducing DMRS and CSI-RS, make remaining REs in OFDM symbol that contains REs for transmitting CSI-RS and/or DM-RS constitute REG to transmit backhaul link control channel information or abandon them, thus, on the basis of maximizing the reservation of existing LTE system specification, specifying resource allocation scheme of backhaul link control channel information in corresponding physical resource block, giving consideration to both simple specification design and full utilization of resources, and realizing flexible design and allocation in light of the demand of real system.