Cellular Relay Station Scheduling for Throughput
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Solution Overview
Problem
Current cellular systems face challenges in efficiently managing radio resources for inter-antenna cooperative transmission, leading to increased radio resource usage and limited transmission capacity, especially in cell boundary areas, where advanced technologies like signal combining and space time coding are not effectively supported by existing scheduling and channel allocation methods.
Innovation Solution
A method and apparatus for radio resource allocation in a cellular system using a cable relay station, which classifies mobile stations into Cooperative Transmission (CT) and Single Transmission (ST) based on channel capacities, selects channels with the highest priority, and allocates resources using pre-cooperation information, thereby enhancing throughput through inter-antenna cooperative transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If inter-antenna cooperative transmission is implemented using existing scheduling methods, then signal quality and transmission capacity are improved, but radio resource usage increases significantly
Solution Approach 1:
The patent segments mobile stations into two distinct groups: CT MSs (cooperative transmission) and ST MSs (single transmission). This segmentation is based on channel capacity thresholds, allowing the system to apply different transmission modes selectively. By dividing the mobile station population, the system achieves cooperative transmission benefits for suitable users while avoiding excessive resource consumption for others, thus resolving the contradiction between improved signal quality and reduced radio resource usage.
Solution Approach 2:
The patent applies local quality by making transmission mode decisions individualized for each mobile station based on its specific channel conditions. Mobile stations with channel capacity above a predetermined threshold are assigned cooperative transmission mode, while those below the threshold use single transmission mode. This localized, condition-based approach ensures that inter-antenna cooperative transmission is applied only where it provides net benefit, balancing signal quality improvement with radio resource conservation.
2Productivity
If inter-antenna cooperative transmission is used to enhance transmission capacity, then throughput in cell boundary areas is improved, but system complexity increases
Solution Approach 1:
The patent implements preliminary action by pre-classifying mobile stations into CT and ST groups based on their channel capacity measurements before the actual transmission occurs. The base station receives channel capacity information from mobile stations, compares it against a predetermined threshold, and determines the appropriate transmission mode in advance. This preliminary classification simplifies the scheduling process during actual transmission, as the base station already knows which mobile stations require cooperative transmission resources, reducing real-time scheduling complexity while maintaining high throughput.
3Adaptability or versatility
If dynamic channel allocation is performed for cooperative transmission, then system adaptability is improved, but computational requirements and processing time increase
Solution Approach 1:
The patent implements self-service by enabling mobile stations to autonomously measure and report their own channel capacity to the base station. Each mobile station independently evaluates its channel conditions and provides this information for scheduling decisions. This self-measurement approach reduces the computational burden on the base station, as it only needs to compare received channel capacity values against a threshold rather than performing complex channel estimation and allocation calculations, thereby reducing processing time while maintaining adaptability.
Data Source
AI summary
A method for scheduling in a cellular system using a relay station (RS) through an inter-antenna cooperative transmission technology based on pre-cooperation information according to each channel in a cellular system using a cable RS in order to increase the throughput of the entire system. The steps include classifying all mobile stations (MSs) in a corresponding cell based into Cooperative Transmission (CT) MSs for cooperative transmission and Single Transmission (ST) MSs for to each channel; mapping channel-by-channel channel capacities of the CT MSs and ST MSs classified according to each channel, selecting a channel with a highest priority, and receiving a request message from a corresponding MS according to whether the capacity of the selected channel satisfies preset CT criteria and selecting an MS having a metric value of a highest priority according to a corresponding scheduling algorithm, from among multiple requesting MSs.