LTE-WLAN Aggregation Uplink Buffer Status Reporting
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Solution Overview
Problem
Current LTE-WLAN aggregation technologies lack a solution for efficient uplink data transmission, leading to increased pressure on cellular networks and suboptimal resource allocation.
Innovation Solution
A method and terminal configuration that determines the current amount of uplink data in a buffer, sends a Buffer Status Report to allocate resources based on the difference between current and intended data transmission, and adjusts data transmission between cellular and WLAN links based on network status and link quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If LTE-WLAN aggregation is deployed to balance dynamic loads, then cellular network pressure is reduced, but uplink transmission resource allocation becomes complex
Solution Approach 1:
The patent segments uplink data transmission by separating it into two independent paths: LTE uplink transmission and WLAN uplink transmission. The terminal device independently manages data transmission on each link based on separate resource allocations from the network, avoiding the complexity of coordinated resource management across both links while achieving load balancing.
Solution Approach 2:
The patent introduces a network-side intermediary mechanism where the base station allocates separate uplink resources for both LTE and WLAN transmissions. This intermediary resource allocation simplifies the terminal's decision-making process by providing clear, pre-configured resource grants for each link, reducing the complexity of uplink resource management.
2Device complexity
If all uplink data is transmitted through cellular network, then resource allocation is simple, but cellular network pressure increases
Solution Approach 1:
The patent segments the uplink data transmission load by dividing it between cellular network and WLAN. The terminal independently transmits data on both links based on separate resource allocations, distributing the network load effectively while maintaining simple resource management through independent link handling.
Solution Approach 2:
The patent merges cellular network and WLAN resources to handle uplink transmission simultaneously. By combining both transmission paths with independent resource allocation, the system achieves load distribution across multiple networks while maintaining the simplicity of individual resource management.
3Productivity
If uplink data is transmitted through WLAN, then cellular network pressure is reduced, but resource allocation coordination becomes difficult
Solution Approach 1:
The patent segments resource allocation coordination by treating LTE and WLAN as independent transmission channels. The network allocates resources separately for each link, and the terminal independently manages transmission on each link without requiring complex coordination between the two networks, simplifying overall resource management.
Solution Approach 2:
The terminal device performs self-service by independently managing uplink transmission on both LTE and WLAN links based on separately allocated resources. This self-service approach eliminates the need for complex inter-network coordination mechanisms, as each link operates autonomously with its own resource allocation.
Data Source
AI summary
Provided is a method of data transmission. The method includes determining a current amount of data in an uplink buffer that is configured to store uplink data, wherein the uplink data in the uplink buffer is distributed through a Packet Data Convergence Protocol (PDCP) layer; sending a Buffer Status Report (BSR) to a base station in the cellular network, wherein the BSR comprises a difference value between the current amount of data and an amount of the data to be transmitted by the second link, and wherein the base station is configured to allocate an uplink resource for the terminal based on the difference value; and transmitting uplink data to the correspondent node through the second link based on the amount of the data to be transmitted to the correspondent node by the second link.