CoMP Reception Backhaul Capacity Adaptation
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Solution Overview
Problem
In wireless communication systems, uplink Coordinated Multi Point (CoMP) reception is hindered by limitations in backhaul capacity and latency, leading to exclusion of potentially beneficial cooperation candidates and potential data loss due to congestion.
Innovation Solution
A network node method that determines available backhaul capacity and received signal quality to select cooperating reception points and adjust Transport Block Size (TBS) for efficient CoMP reception, avoiding overload and ensuring successful cooperation requests.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If uplink CoMP reception is performed between reception points belonging to different RBSs, then system performance and robustness are improved through multi-antenna diversity, but backhaul capacity is exceeded causing data loss and congestion
Solution Approach 1:
The patent implements dynamic adaptation of Transport Block Size (TBS) based on real-time backhaul capacity conditions. The network node monitors backhaul availability and adjusts the TBS parameter dynamically to match current network conditions, allowing the system to maintain optimal CoMP reception performance while preventing backhaul overload. This dynamic parameter adjustment enables the system to flexibly respond to changing traffic conditions and backhaul availability.
Solution Approach 2:
The patent changes the TBS parameter according to backhaul capacity conditions. When backhaul capacity is sufficient, larger TBS values are used to maximize data throughput. When backhaul capacity is limited, the TBS is reduced to prevent congestion. This parameter change strategy allows the system to optimize the trade-off between utilizing multi-RBS CoMP benefits and maintaining backhaul stability.
2Productivity
If higher capacity is provided on the X2 interface to enable CoMP data transmission between RBSs, then CoMP cooperation is enabled, but infrastructure cost increases significantly
Solution Approach 1:
Instead of providing full high-capacity X2 interface infrastructure between all RBSs, the patent applies partial action by selectively enabling CoMP reception only when backhaul capacity conditions are favorable. The system uses available backhaul capacity partially or fully depending on current conditions, rather than requiring always-available high-capacity connections. This approach enables CoMP functionality without requiring expensive universal infrastructure upgrades.
Solution Approach 2:
The patent implements self-service by having the network node autonomously monitor backhaul capacity conditions and adapt TBS parameters without requiring manual infrastructure configuration or upgrades. The system automatically adjusts its operation to utilize available backhaul resources effectively, eliminating the need for costly infrastructure modifications to enable CoMP functionality.
3Measurement precision
If cooperation candidates are selected based on signal quality alone, then reception quality is optimized, but backhaul congestion occurs causing data loss
Solution Approach 1:
The patent implements feedback by having the network node continuously monitor backhaul capacity conditions and use this information to adjust TBS parameter selection. The system receives feedback about backhaul availability and adapts its CoMP operation accordingly, reducing TBS when backhaul capacity is low to prevent congestion and data loss, while maintaining optimal signal quality selection criteria.
Solution Approach 2:
The patent applies preliminary action by assessing backhaul capacity conditions before selecting and activating CoMP cooperation candidates. The network node evaluates whether sufficient backhaul capacity is available to support the additional data transmission required for CoMP operation. This preliminary assessment prevents selection of cooperation candidates that would lead to backhaul congestion and data loss, ensuring both signal quality optimization and data integrity.
Data Source
AI summary
A network node and a method therein for CoMP reception of a transmission from a wireless device are provided. The method comprises determining (110) an available backhaul capacity of a reception point of the serving RBS and of at least one potential reception point of respective further RBS(s); and determining (120) a received signal quality of a received signal, transmitted from the wireless device, received by the reception point of the serving RBS and received by the at least one potential reception point of the respective further RBS(s). The method comprises determining (130) cooperating reception of the transmission from the wireless device and determining a TBS for the transmission from the wireless device based on the determined available backhaul capacity and received signal quality; and notifying (140) the respective RBS(s) of the determined cooperation reception point(s) about their participation in the CoMP reception.