Cooperative Cell Base Station Uplink Resource Allocation
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Solution Overview
Problem
Next-generation wireless communication systems using high-frequency bands face challenges with frequent handovers and link failures due to the small cell radius and increased number of base stations, leading to overhead and reliability issues in handling UpLink (UL) resource requests.
Innovation Solution
A cooperative cell-based communication system where a master Base Station (BS) exchanges data with multiple BSs to efficiently manage UL resource requests by receiving and determining scheduled resource allocation information from slave BSs, ensuring reliable and efficient data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the cell radius is reduced to support high-capacity data services in high-frequency bands, then the data transmission capacity is improved, but the number of handovers increases leading to increased system overhead
Solution Approach 1:
The system segments the cell coverage area into multiple cooperative cells, each served by a different base station. Instead of one base station serving the entire area, multiple base stations cooperate to serve different spatial segments, reducing the need for handovers when users move between segments.
Solution Approach 2:
Multiple base stations are merged into a cooperative cell structure where they work together as a unified system. The base stations share information and coordinate resource allocation, combining their capabilities to provide seamless service across what would otherwise be separate cells, thereby reducing handover overhead.
2Area of stationary object
If the number of base stations is increased to cover the service area, then the service coverage is improved, but the frequency of inter-cell handovers increases
Solution Approach 1:
The system performs preliminary actions by establishing cooperative relationships between base stations before handovers are needed. Base stations in advance prepare for potential user movements by pre-coordinating resource allocation and maintaining synchronized timing, so that when handovers occur, they can be executed quickly and efficiently.
Solution Approach 2:
The cooperative cell structure enables dynamic resource allocation and flexible base station roles. Base stations can dynamically adjust their coverage areas and resource assignments based on real-time user distribution and channel conditions, allowing the system to adapt to user movements without requiring frequent handovers.
3Productivity
If high-frequency bands are used to support high-capacity services, then the data rate is improved, but the link reliability deteriorates due to movement and obstacles
Solution Approach 1:
Multiple base stations act as intermediaries in the communication system. When one base station experiences poor link conditions due to obstacles or user movement, the cooperative cell structure allows other base stations to serve as alternative intermediaries, maintaining reliable data transmission through coordinated multi-point communication.
Solution Approach 2:
The system dynamically changes communication parameters such as resource allocation, transmission power, and base station selection based on real-time channel conditions. When link reliability deteriorates due to movement or obstacles, the system adjusts these parameters to maintain high data rates, selecting the best base station or combination of base stations for each user.
Data Source
AI summary
A method for handling an UpLink (UL) resource request in a master Base Station (BS) exchanging data with a plurality of BSs in a communication system is provided. The method includes receiving UL resource request information from at least one slave BS in a cooperative cell, determining scheduled UL resource allocation information indicating information about resources for transmitting UL data, based on the UL resource request information, and delivering the scheduled UL resource allocation information to a Subscriber Station (SS) and the at least one slave BS. The UL resource request information may be generated depending on a UL resource request of the SS.