PDSCH Resource Allocation in Relay Backhaul Transmissions
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Solution Overview
Problem
In wireless communication systems, particularly in LTE-Advanced networks, there is a need for effective techniques to manage resources for relay backhaul transmissions, as existing methods struggle to efficiently determine and allocate resources for physical downlink shared channel (PDSCH) transmissions, especially in scenarios where relay nodes are involved, leading to interference and limitations in simultaneous data transmission.
Innovation Solution
The proposed solution involves identifying and determining resources configured for physical downlink control channel (PDCCH) transmissions from a base station, receiving PDCCH transmissions that assign PDSCH, and determining available resources based on allocated and assigned resources, allowing for dynamic resource allocation and indication of available resources for PDSCH transmissions, thereby optimizing resource usage and minimizing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If resources are allocated for PDCCH transmissions from a base station, then control information can be transmitted reliably, but the resources available for PDSCH transmissions are reduced
Solution Approach 1:
The patent segments the downlink resources into distinct regions: a first region allocated for PDCCH transmissions and a second region allocated for PDSCH transmissions. This segmentation allows both control information and data transmissions to occur simultaneously without resource conflicts, resolving the contradiction between ensuring reliable control transmission and maintaining adequate data transmission resources.
Solution Approach 2:
The patent introduces a spatial dimension by dividing resources across different frequency or time regions. By creating a first region and a second region that are distinct in the resource domain, the system enables simultaneous PDCCH and PDSCH transmissions without mutual interference, effectively increasing the total capacity despite the segmentation.
2Area of stationary object
If relay nodes are deployed to extend network coverage, then service coverage is improved, but resource management complexity increases
Solution Approach 1:
The patent implements a universal resource allocation mechanism that works for both direct base station-UE communications and relay node communications. The same first and second region division is applied consistently across all nodes, allowing relay nodes to manage resources using identical procedures as macro base stations, thereby reducing the complexity increase that would otherwise result from deploying additional relay infrastructure.
3Productivity
If dynamic resource allocation is implemented, then transmission efficiency is improved, but the complexity of determining available resources increases
Solution Approach 1:
The patent performs preliminary resource allocation by pre-defining the first region for PDCCH and the second region for PDSCH before actual transmissions occur. This preliminary structuring eliminates the need for complex real-time resource determination calculations during transmission, as nodes simply need to identify which pre-defined region corresponds to which channel type, thereby maintaining high transmission efficiency while reducing computational complexity.
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for indicating (e.g., by a donor base station) resources available for physical downlink shared channel (PDSCH) transmissions from a base station is provided. Certain aspects of the present disclosure provide techniques for determining (e.g., by a relay node or UE) resources available for physical downlink shared channel (PDSCH) transmissions from a base station.