Joint Reception Backhaul Capacity Allocation
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Solution Overview
Problem
Joint reception in cellular radio communication systems faces challenges due to backhaul congestion, which can lead to failed or delayed receptions even when limiting the number of reception points, as existing methods do not effectively manage backhaul capacity and cooperating node capacity.
Innovation Solution
A method and node configuration that select cooperating nodes and user equipment units based on radio link quality and backhaul capacity, allocating radio resources to avoid congestion by using a subset of radio resource elements for joint reception and refining data transmission levels to match available backhaul bandwidth, while prioritizing user equipment units likely to benefit most from joint reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If joint reception is performed using multiple reception points to enhance reception quality, then reception quality is improved, but backhaul congestion occurs leading to failed or delayed receptions
Solution Approach 1:
The patent applies partial action by selecting only a subset of radio resource elements for joint reception processing rather than processing all received elements. The serving node identifies and processes only those resource elements that are likely to benefit from joint reception, leaving others to be handled by individual nodes. This reduces the volume of data requiring backhaul transmission while maintaining enhanced reception quality for critical transmissions.
Solution Approach 2:
The patent implements local quality by applying joint reception processing selectively to specific radio resource elements based on their individual characteristics and requirements. Each resource element is evaluated independently, and only those meeting certain criteria (such as being from user equipment likely to benefit most) undergo joint reception. This localized approach optimizes resource utilization and minimizes backhaul load.
2Reliability
If all possible antennas are used for joint reception processing, then reception quality is maximized, but system complexity increases
Solution Approach 1:
The patent applies partial action by processing only a selected subset of received radio resource elements through joint reception rather than all elements. The serving node identifies resource elements from user equipment units most likely to benefit from joint reception and processes only those, reducing computational complexity while maintaining effectiveness.
Solution Approach 2:
The patent segments the set of received radio resource elements into different groups: those selected for joint reception processing and those handled individually. This segmentation allows the system to manage complexity by dividing the processing task into manageable portions, with only critical segments requiring complex joint processing.
Data Source
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AI summary
The disclosure relates to cellular radio communication systems 1, and especially to performing a joint reception of uplink transmissions from user equipment devices UEi, UE2. A serving node 2 and a cooperating node 3 is described together with methods performed by each node 2, 3. The serving node (2) comprises a user equipment selector (81), a cooperating node selector (82) and a radio element selector (83). The serving node also includes a user equipment allocator (86), a joint reception requester (85) configured to order joint reception data from selected cooperating nodes (3), and a backhaul capacity obtainer (73) configured to obtain a backhaul capacity of selected cooperating nodes (3). Especially, the radio element selector (83) is adapted to select radio resource elements (Bi, B2) based on a determined backhaul capacity. By considering the backhaul capacity, the backhaul can be employed for joint reception without becoming overloaded. The cooperating node (3) especially includes an element prioritizing unit (45) configured to prioritize between data obtained from different the radio resource elements (B1, B2).