Wireless Resource Allocation via Inter-Base Station Coordination
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Solution Overview
Problem
Wireless telecommunications systems face challenges in resource allocation, particularly at cell edges, where high transmission powers cause interference with neighboring cells, and handover processes are disrupted, leading to suboptimal performance and quality of service (QoS).
Innovation Solution
A system comprising two basestations that detect mobile terminals with low communication quality and share information via an X2 interface to allocate resources in a way that avoids interference, allowing the second basestation to reallocate resources to prevent disturbances and optimize communication quality, enabling synchronous handovers and dynamic management of reserved cell-edge frequency pools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high transmission power is used by mobile terminals at cell edges, then communication quality is improved, but interference with neighboring cells increases
Solution Approach 1:
The patent applies preliminary action by having the first basestation detect mobile terminals with poor communication quality before handover occurs, and proactively share this information with the second basestation. This allows the second basestation to prepare resource allocation in advance, avoiding interference issues before they arise rather than reacting after interference occurs.
Solution Approach 2:
The patent uses an intermediary mechanism where the first basestation acts as a mediator by detecting mobile terminal conditions and sharing this information with the second basestation through an X2 interface. This intermediary information exchange enables coordinated resource allocation between cells, resolving the interference problem without requiring the mobile terminal to reduce its transmission power.
2Ease of manufacture
If static frequency reuse schemes are used, then frequency planning is simplified, but resource utilization is suboptimal
Solution Approach 1:
The patent applies dynamics by replacing static frequency reuse schemes with a dynamic resource allocation mechanism. The second basestation dynamically adjusts resource allocation based on real-time information about mobile terminal conditions and existing resource usage in the first cell, optimizing resource utilization while maintaining frequency planning simplicity through automated decision-making.
Solution Approach 2:
The patent uses parameter changes by having the second basestation modify resource allocation parameters (time-frequency blocks) based on received information about mobile terminal communication quality and existing allocations. This dynamic parameter adjustment optimizes resource utilization without requiring complex frequency planning, as the system adapts to actual conditions rather than relying on predetermined static schemes.
3Speed
If handover is performed without resource coordination, then handover speed is improved, but communication interruption increases
Solution Approach 1:
The patent applies preliminary action by having the first basestation detect mobile terminal conditions and share this information with the second basestation before the handover actually occurs. This allows the second basestation to pre-allocate resources and prepare for the handover, reducing the interruption time when the handover executes while maintaining fast transition speed.
Solution Approach 2:
The patent uses feedback mechanisms where the first basestation provides feedback information about mobile terminal communication quality and resource usage to the second basestation. This feedback loop enables coordinated resource allocation that minimizes handover interruption, as the second basestation receives real-time information about the mobile terminal's status and adjusts resource allocation accordingly.
Data Source
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AI summary
A wireless telecommunications system is provided in which mobile terminals requiring high transmission power are identified as being potentially disturbing to neighbouring cells. Information relating to the identified mobile terminals is sent to the neighbouring basestation, so that resource allocation decision can be made using such information.