Primary Base Station Offloading Adjustment for Multi-Stream Aggregation
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Solution Overview
Problem
In LTE systems with cross-site carrier aggregation, non-uniform transmission delays across different sites lead to challenges in maintaining normal communication between terminals and base stations due to differences in load statuses and radio channel conditions, causing data loss and out-of-order delivery.
Innovation Solution
A data transmission method where a primary base station adjusts offloading data allocated to a multi-stream aggregation base station based on offloading information, ensuring that the sequence number of a packet data unit received by the terminal falls within a reordering window by adjusting the offloading speed of low-speed and high-speed stream base stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple data streams are aggregated from different sites in cross-site carrier aggregation, then terminal throughput is increased and mobility management is simplified, but non-uniform transmission delays cause data loss and out-of-order delivery
Solution Approach 1:
The patent applies preliminary action by having the terminal proactively send offloading information (including sequence numbers and buffer status) to the network side before data loss occurs. This allows the network to predict and prevent out-of-order delivery issues by adjusting offloading data allocation in advance, rather than reacting after problems occur.
Solution Approach 2:
The patent implements feedback mechanisms where the terminal continuously reports buffer status, sequence number information, and reordering window status to the network. The network uses this feedback to dynamically adjust offloading data allocation, creating a closed-loop control system that maintains data delivery reliability while enabling multi-stream aggregation.
2Productivity
If offloading data is allocated to multiple base stations without adjustment, then data transmission capacity is increased, but sequence number misalignment occurs causing communication failures
Solution Approach 1:
The patent applies dynamics by making the offloading data allocation dynamic rather than static. The network continuously adjusts the amount of offloading data allocated to each base station based on real-time feedback from the terminal about buffer status, sequence numbers, and reordering window conditions. This dynamic adjustment prevents sequence number misalignment while maintaining high transmission capacity.
Solution Approach 2:
The patent changes key parameters including offloading data volume, sequence number ranges, and reordering window sizes based on network conditions and terminal capabilities. By dynamically adjusting these parameters, the system maintains communication stability while utilizing multiple base stations for high-capacity transmission.
3Ease of manufacture
If a fixed reordering window size is used, then implementation is simple, but it cannot adapt to varying transmission delays across different sites
Solution Approach 1:
The patent makes the reordering window size dynamic rather than fixed. The terminal and network jointly determine and adjust the reordering window size based on observed transmission delays, sequence number patterns, and buffer status. This allows the system to adapt to varying delays across different sites while maintaining manageable complexity through standardized adjustment procedures.
Solution Approach 2:
The terminal performs self-service by autonomously managing its reordering window and buffer based on received sequence numbers and transmission conditions. The terminal automatically adjusts its reordering behavior without requiring complex network control, simplifying implementation while adapting to varying delays through local decision-making.
Data Source
AI summary
A present invention discloses a data transmission method, a base station, and a wireless communications device, which can ensure normal communication between a terminal and a base station in a multi-stream aggregation scenario. The method includes: receiving, by a primary base station, offloading information sent by a wireless communications device, where the wireless communications device is a secondary base station or a terminal; and adjusting, by the primary base station according to the offloading information, offloading data that is allocated to a multi-stream aggregation base station. The present invention is applicable to the communications field.