Secondary Station Uplink Request Buffering and Scheduling
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Solution Overview
Problem
In cellular networks, secondary stations face inefficiencies in transmitting buffer status reports and scheduling requests due to the need for allocated resources, leading to potential breaches in Quality of Service (QoS) and wasteful resource usage if they send requests too frequently or not frequently enough.
Innovation Solution
A method where secondary stations buffer data packets and send a request for uplink transmission resources only if a specific request condition is met, based on previous grants, thereby reducing unnecessary scheduling requests and ensuring QoS compliance by adjusting the timing of these requests according to transmission conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If secondary stations transmit scheduling requests frequently to ensure QoS, then quality of service is improved, but resource usage efficiency deteriorates due to unnecessary requests
Solution Approach 1:
The secondary station performs preliminary evaluation of buffer status and transmission needs before sending a scheduling request. It checks whether data is actually present in the buffer and whether a grant is currently available, only initiating a request when necessary, thus avoiding unnecessary resource consumption while ensuring QoS when needed
Solution Approach 2:
The secondary station uses feedback from the grant status and buffer status to control its request transmission behavior. By continuously monitoring whether a grant is available and whether data is present in the buffer, it dynamically adjusts its request transmission timing to balance QoS requirements with resource efficiency
2Productivity
If secondary stations wait for granted resources before transmitting BSR, then resource allocation is optimized, but QoS may be breached if grants are not provided timely
Solution Approach 1:
The system dynamically adjusts the secondary station's behavior based on real-time conditions. When data arrives in the buffer, the station evaluates whether to send a BSR immediately or wait for a grant, and when no grant is available, it sends a simplified scheduling request. This dynamic adaptation allows the system to respond to QoS requirements while maintaining resource allocation efficiency
3Reliability
If secondary stations transmit simplified BSR without granted resources, then QoS is maintained, but transmission resource waste increases
Solution Approach 1:
The system uses partial action by transmitting only the essential information in a simplified scheduling request (single bit indicating data presence) rather than a full BSR when no grant is available. This partial transmission provides sufficient QoS information while minimizing resource consumption, avoiding the excessive action of sending complete BSR messages unnecessarily
Data Source
AI summary
The present invention relates to method for communicating between a primary station and a secondary station comprising(a) at the secondary station, upon arrival of a data packet to be transmitted to the primary station, buffering said data packet in a buffer, and transmitting to the primary station a request for an uplink transmission resource if a request condition is satisfied, said request condition being based on at least one previous grant of uplink transmission resource,(b) at the primary station, granting to the secondary station an uplink transmission resource to be used.