Coordinated Base Station Scheduling for Delayed Interface Bottlenecks
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Solution Overview
Problem
Conventional distributed scheduling in communication systems experiences delays due to repeated information exchange between cells, limiting the achievement of high data rates and increased cell-edge throughput even when cooperative multiple point (CoMP) techniques are employed.
Innovation Solution
A communication system where base station devices perform scheduling without using information from one or more other base stations, minimizing delays by ignoring or not exchanging scheduling information that causes delays, and by pre-determining mapping symbols for physical downlink shared channels (PDSCH) to ensure coordinated scheduling without delay bottlenecks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If distributed scheduling is used with repeated information exchange between cells, then coordinated scheduling is achieved, but scheduling delays increase
Solution Approach 1:
The patent applies preliminary action by pre-determining and pre-configuring scheduling information and resource allocation before the actual scheduling decision is needed. Base stations exchange and store scheduling information in advance, so when scheduling is required, the information is already available, eliminating the need for repeated real-time exchanges and reducing scheduling delays.
2Reliability
If scheduling information is exchanged between base stations, then coordination is improved, but information exchange delays occur
Solution Approach 1:
The patent implements preliminary action by having base stations exchange scheduling information in advance and store it locally. This pre-exchange of information ensures that when scheduling decisions need to be made, the necessary coordination data is already available, eliminating the need for time-consuming real-time information exchange.
3Reliability
If conventional distributed scheduling with information exchange is used, then cooperative multiple point techniques are enabled, but cell-edge throughput is limited due to delays
Solution Approach 1:
The patent applies preliminary action by pre-configuring resource allocation and scheduling information for cooperative multiple point transmissions. This allows base stations to have the necessary coordination data ready in advance, enabling faster scheduling decisions and improving cell-edge throughput by eliminating the delays associated with repeated information exchange during actual transmission.
Data Source
AI summary
The present invention has an object to provide a communication system capable of minimizing effects due to a delay among a plurality of base station devices as much as possible in scheduling for communication with a terminal device in cooperation among the plurality of base station devices. Cells1 to 3 can each perform scheduling without using information for scheduling notified from one or a plurality of cells among pieces of information for scheduling notified from other cells. For example, in a case where an interface between the cell1 and cell3 has a large delay amount, the cell1 performs scheduling without using information S13 notified to the cell1 by the cell3, and the cell3 performs scheduling without using information S11 notified to the cell3 by the cell1.