Base Station Carrier Selection for Relay Load Balancing
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Solution Overview
Problem
In wireless communication systems, it is challenging for base stations to optimally select the best carrier for serving user equipment (UEs) when multiple carriers are available, especially when relays are involved, as existing methods do not effectively consider the load distribution across carriers, leading to potential service quality issues due to uneven UE distribution and communication loads.
Innovation Solution
The base station selects the carrier to serve a UE based on the number of UEs served by relays on each carrier, choosing the carrier with fewer UEs to minimize load and maximize capacity, thereby ensuring better service quality by potentially designating it as the primary component carrier (PCC) for carrier-aggregation service.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the base station serves UEs on multiple carriers without considering relay load distribution, then carrier aggregation service can be provided, but uneven UE distribution and communication loads occur leading to service quality issues
Solution Approach 1:
The base station dynamically changes the carrier selection parameter based on relay load conditions. When determining that a first carrier has fewer UEs served by relays compared to a second carrier, the base station adjusts its serving decision to select the first carrier, thereby adapting the system operation to current load conditions and achieving more uniform distribution
Solution Approach 2:
The base station implements a feedback mechanism by continuously monitoring and determining the number of UEs served by relays on different carriers. This information feedback enables the base station to make informed carrier selection decisions, comparing load conditions across carriers and selecting the carrier with lower relay UE counts to maintain service quality
2Productivity
If UEs are distributed unevenly across carriers, then some carriers become heavily loaded, but overall system capacity is underutilized
Solution Approach 1:
The base station dynamically adjusts carrier assignment based on the parameter of relay-served UE quantities. By changing the carrier selection decision according to real-time load parameters, the system achieves more uniform UE distribution across carriers while maximizing overall system capacity utilization
Solution Approach 2:
The carrier selection process transitions from a static approach to a dynamic one, where the base station continuously evaluates relay load conditions and adjusts carrier assignments accordingly. This dynamic adaptation enables the system to respond to changing load conditions and maintain optimal UE distribution
3Ease of operation
If the base station selects carriers without considering relay loads, then carrier selection is simple, but communication congestion occurs on heavily loaded carriers
Solution Approach 1:
The base station incorporates feedback from relay load monitoring into the carrier selection process. By determining the number of UEs served by relays on each carrier and using this information to guide carrier selection, the system maintains operational simplicity while avoiding congestion and ensuring efficient data transmission
Solution Approach 2:
The base station performs self-service by autonomously determining relay load conditions and making carrier selection decisions based on this information. This self-directed approach eliminates the need for complex external control mechanisms while achieving optimal carrier selection that prevents congestion
Data Source
AI summary
Disclosed is a mechanism to help control which of multiple carriers a base station will serve a UE on—perhaps which carrier should be the UE's primary component carrier for carrier-aggregation service. The disclosed mechanism can apply in a scenario where a base station is configured to provide service on multiple carriers including at least a first carrier and a second carrier, and when the base station is serving one or more relays respectively on each carrier. In that scenario, the selection of a carrier on which the base station should serve a UE could be made based at least on a consideration of how many UEs are served in total by the one or more relays that the base station serves respectively on each carrier, such as by selecting the carrier having the fewest such relay-served UEs.