Uplink Resource Allocation via X2 Buffer Ratio Exchange
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Solution Overview
Problem
In wireless communication systems, existing methods for allocating uplink resources do not efficiently consider the buffer size ratio across different eNBs, leading to potential wastage of radio resources due to over-allocation.
Innovation Solution
The method involves transmitting uplink resource allocation information between eNBs using the X2 interface, considering the buffer size ratio per radio bearer, comprising one PDCP entity and two RLC and MAC entities for each direction, to allocate UL resources efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If uplink resources are allocated without considering buffer size ratio across eNBs, then resource allocation is simple, but radio resources are wasted due to over-allocation
Solution Approach 1:
The patent implements feedback mechanisms where eNBs exchange buffer size information and resource allocation details through the X2 interface. Each eNB receives feedback from the other about the UE's buffer status and adjusts its resource allocation decisions accordingly, preventing over-allocation while maintaining coordinated resource management across multiple eNBs
Solution Approach 2:
The patent applies preliminary action by having eNBs exchange resource allocation information and buffer size data before final resource allocation decisions are made. This advance information sharing allows each eNB to pre-adjust its allocation strategy based on the other eNB's buffer status, avoiding the need for complex real-time coordination during actual resource allocation
2Productivity
If buffer size ratio is considered in resource allocation, then resource utilization is optimized, but information exchange complexity increases
Solution Approach 1:
The patent extracts only the essential buffer size information and resource allocation parameters needed for optimization, transmitting them through the X2 interface between eNBs. By selecting and exchanging only the critical data elements (buffer size ratios and allocation decisions) rather than complete system states, the patent reduces information exchange overhead while maintaining allocation efficiency
Solution Approach 2:
The patent changes parameters by focusing on buffer size ratios as the key metric for coordination rather than exchanging detailed buffer state information. This parameter transformation simplifies the information exchange process while still enabling efficient resource allocation decisions based on relative buffer conditions across eNBs
Data Source
AI summary
The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for allocating uplink resources in the wireless communication system, the method comprising: transmitting, by a first eNB to a second eNB, uplink (UL) resource allocation information for a user equipment (UE) connected with both the first eNB and the second eNB; receiving, by a first eNB from the UE, buffer size information; allocating one or more UL resources to the UE, by considering both of the buffer size information and the UL resource allocation information, wherein the UL resource allocation information indicates a ratio of the buffer size to be considered in each eNB.