Multi-cell Uplink Coordination via Predictive Scheduling for High Latency
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Solution Overview
Problem
In multi-cell uplink coordinated communication systems, high exchange latency between base stations hinders joint demodulation and decoding of uplink data, limiting the increase in uplink rate for user equipment due to delayed or missed scheduling information, especially in scenarios with large latency or limited exchange capabilities.
Innovation Solution
A method where the first base station determines exchange latency thresholds and sends new or retransmission scheduling information to neighboring base stations, allowing for joint demodulation and decoding even with large latency by predicting and buffering data, and adjusting scheduling to minimize interference and optimize resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple cells exchange uplink data for joint demodulation and decoding, then uplink rate increases, but data exchange latency must be strictly controlled which limits system adaptability
Solution Approach 1:
The invention applies preliminary action by having the serving cell predict retransmission scheduling information and send it to coordinating cells in advance, before the actual retransmission occurs. This allows coordinating cells to prepare for joint demodulation and decoding ahead of time, overcoming the limitation of large exchange latencies. The prediction and advance notification mechanism ensures that even with large latency, the coordinating cells can receive and process scheduling information timely, thus maintaining uplink rate improvement while adapting to large latency scenarios.
2Measurement precision
If retransmission scheduling is performed after data exchange, then decoding accuracy improves, but timing requirements become stricter reducing operational flexibility
Solution Approach 1:
The invention performs preliminary action by predicting and sending retransmission scheduling information in advance to coordinating cells. This allows the system to maintain strict timing requirements for accurate joint demodulation and decoding while increasing operational flexibility. The serving cell can flexibly determine retransmission parameters (such as time-frequency resources, modulation and coding schemes) and notify coordinating cells beforehand, enabling them to prepare for accurate decoding without facing overly strict real-time timing constraints during actual retransmission.
3Reliability
If serving cell waits for coordinating cell data before joint decoding, then decoding reliability improves, but processing time increases reducing system efficiency
Solution Approach 1:
The invention applies preliminary action by having the serving cell predict and send retransmission scheduling information to coordinating cells in advance. This eliminates the need for the serving cell to wait for coordinating cell data before proceeding with joint decoding operations. The coordinating cells can independently prepare for joint demodulation and decoding based on the advance notification, significantly reducing processing time while maintaining decoding reliability through predicted scheduling information that ensures accurate timing and resource allocation.
Data Source
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AI summary
Embodiments of the present invention provide a multi-cell uplink coordinated communication method and a base station, relate to the communications field, and can resolve a problem that joint data receiving cannot be performed when an exchange latency between cells is large. The method is as follows: A first base station predicts retransmission scheduling information for UE in advance, and sends the retransmission scheduling information to a second base station having a large exchange latency, so that a cell of the second base station serves as a coordinating cell to perform joint data receiving when the UE retransmits data. Alternatively, a first base station predicts new transmission scheduling information according to a service type of UE, and sends the new transmission scheduling information to a second base station in advance, so that the second base station having a large exchange latency may receive the new transmission scheduling information, to perform joint data receiving. Alternatively, a second base station having a large latency in exchange with a first base station buffers air interface data that is within fixed duration before any moment, so that the second base station having a large exchange latency may obtain corresponding air interface data according to scheduling information, to perform joint data receiving. The embodiments of the present invention are used for uplink coordinated communication when an exchange latency between cells is large.