Carrier Selection for Partial Radio Link Failure in Multi-Carrier Networks
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Solution Overview
Problem
In multiple component carrier wireless telecommunications networks, partial radio link failures can lead to inefficient resource allocation and reduced data throughput due to the network's unawareness of failed carriers, causing user equipment to incorrectly allocate resources and potentially re-establish links unnecessarily.
Innovation Solution
User equipment determines a set of available radio frequency carriers by monitoring propagation characteristics and correlating downlink and uplink carriers, then requests network resources on the most likely successful carriers, allowing for efficient scheduling requests and resource allocation, even in the presence of partial radio link failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If user equipment sends scheduling requests on all configured uplink carriers, then the probability of successful resource allocation increases, but resource waste increases on carriers experiencing radio link failure
Solution Approach 1:
The user equipment performs preliminary monitoring of downlink carrier propagation characteristics before sending scheduling requests. By assessing the quality of downlink carriers in advance, the system can predict which uplink carriers are likely to succeed, thereby avoiding wasted resources on failed carriers while maintaining high allocation success rates.
Solution Approach 2:
The system implements feedback mechanisms where the user equipment continuously monitors propagation characteristics of downlink carriers and uses this information to dynamically adjust which uplink carriers are selected for scheduling requests. This closed-loop approach ensures that resource allocation decisions are based on current channel conditions, optimizing both success rate and efficiency.
2Adaptability or versatility
If the network allocates resources on all downlink carriers, then resource allocation flexibility increases, but network overhead increases due to unawareness of failed carriers
Solution Approach 1:
The network performs preliminary assessment of downlink carrier conditions by monitoring propagation characteristics before allocating resources. This advance knowledge allows the network to maintain flexibility in resource allocation while avoiding the overhead of managing allocations on carriers that are already known to be failed or degraded.
Solution Approach 2:
The system extracts and removes failed or degraded carriers from the active resource allocation pool. By identifying and excluding problematic carriers through monitoring, the network maintains allocation flexibility on healthy carriers while eliminating the complexity and overhead associated with managing allocations on failed carriers.
3Measurement precision
If user equipment monitors propagation characteristics of all carriers, then carrier selection accuracy improves, but processing complexity increases
Solution Approach 1:
Instead of uniformly monitoring all carriers with equal intensity, the system applies differentiated monitoring strategies based on local conditions. Carriers showing signs of degradation receive more intensive monitoring and assessment, while stable carriers receive routine monitoring. This localized approach maintains high selection accuracy while reducing overall processing complexity.
Solution Approach 2:
The system performs monitoring at selective levels of detail rather than exhaustive analysis of all carriers simultaneously. By applying partial monitoring actions focused on critical parameters and only when necessary, the system achieves sufficient carrier selection accuracy without the computational burden of complete, continuous analysis of all carriers.
Data Source
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AI summary
A method of requesting network resource in a multiple component carrier wireless telecommunications network, a corresponding method of allocating network resource in response to a request for network resource in a multiple component carrier wireless telecommunications network. User equipment, a network node and computer program product capable of implementing the method. The multiple component carrier wireless telecommunications network comprises a network node and user equipment, each operable to simultaneously transmit and receive signals on more than one radio frequency carrier within a geographical region of the telecommunications network. The method of requesting network resource comprises the steps of: receiving an indication that there is data to be sent to a network node; determining a set of available radio frequency carriers on which data may be transmitted to the network node; and requesting network resource by transmitting an indication that there is data to be sent to the network node on a carrier from the set of determined available carriers. The method of allocating network resource comprises the steps of: receiving an indication of a set of possible radio frequency carriers on which data may be received at the network node; monitoring each possible radio frequency carrier on which data may be received at the network node for a request for network resource; generating, based upon the radio frequency carriers upon which a request for network resource is received, a set of available radio frequency carriers on which data may be successfully received at the network node; allocating network resource to the set of available radio frequency carriers on which data may be successfully received at the network node; and transmitting an indication of the network resource allocation to the user equipment on one or more radio frequency carriers on which the user equipment may receive.