Uplink Data Splitting Between Macro and Micro Base Stations
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Solution Overview
Problem
In LTE-A systems, the flexibility of uplink data transmission is limited due to passive and direct uplink splitting between macro and micro base stations, which hampers real-time data transmission and efficient resource allocation, especially under non-ideal backhaul conditions.
Innovation Solution
The method involves coordinating between macro and micro base stations to determine a split manner for uplink data transmission, where the macro base station determines which logical channel groups to send to each base station based on load conditions and service types, and sends feedback to adjust resource allocation dynamically.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If passive and direct uplink splitting is adopted between macro and micro base stations, then the system structure is simple, but the flexibility of uplink data transmission is limited
Solution Approach 1:
The patent implements dynamic uplink splitting where the macro base station can flexibly determine which logical channel groups are transmitted to the micro base station based on real-time buffer status reports and load conditions. This dynamic decision-making process allows the system to adapt to varying transmission needs while maintaining a relatively simple overall structure, resolving the contradiction between flexibility and complexity.
2Productivity
If macro base station determines all logical channel group allocations, then the control is centralized and simple, but the real-time data transmission efficiency is reduced
Solution Approach 1:
The patent employs a feedback mechanism where the micro base station sends buffer status reports to the macro base station, which then determines the allocation of logical channel groups. This feedback loop enables the macro base station to make informed decisions about which data to forward to the micro base station, improving real-time data transmission efficiency while maintaining centralized control and avoiding excessive coordination complexity.
3Reliability
If uplink resource allocation is done without considering load conditions, then the allocation process is fast, but the load balance between base stations deteriorates
Solution Approach 1:
The patent implements preliminary action by having the macro base station determine the allocation of logical channel groups before actual data transmission occurs. By proactively analyzing buffer status reports and load conditions in advance, the system can make optimal resource allocation decisions that maintain load balance between base stations, while the predetermined nature of this allocation process minimizes the time loss during actual data transmission.
Data Source
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AI summary
Embodiments of the present invention provide an uplink transmission method, a base station and a user equipment. The method includes: receiving uplink split information sent by a first base station, wherein the uplink split information is used for instructing a second base station to receive data in buffers corresponding to N1 logic channel groups of a user equipment, the N1 logic channel groups are determined by the first base station from a buffer status report BSR sent by the UE, and N1 is a positive integer larger than 0; determining N2 logic channel groups from the N1 logic channel groups, wherein N2 is a non-negative integer smaller than or equal to N1; and sending feedback information to the first base station, wherein the feedback information is used for indicating the determined result. In an embodiment of the present invention, during an uplink transmission, a macro base station and a micro base station determine, by coordinating, a split manner of uplink data, thus improving a flexibility of the uplink transmission.