Small Data Sub-frame Overbooking for LTE Control Channel Efficiency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless broadband standards, such as 3GPP LTE, face limited control channel capacity, particularly in Carrier Aggregation scenarios, leading to inefficiencies in data transmission due to high control signal overhead, especially for applications with intermittent and variable data transmission requirements.
Innovation Solution
The implementation of Small Data Sub-frame (SDS) with overbooking, where multiple users share the same resource allocation, reducing the need for explicit control signaling by pre-configuring data sub-frames with candidate packet sets and search orders, allowing efficient data transmission without dedicated control regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If periodic resource allocation is adopted for intermittent data transmission, then resource allocation efficiency is improved, but control signal overhead increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring Semi-Persistent Scheduling (SPS) parameters including resource allocation, modulation and coding scheme, and retransmission settings before data transmission begins. This allows the base station to prepare scheduling configurations in advance, reducing the need for frequent dynamic control signaling during actual data transmission, thereby improving resource allocation efficiency while reducing control signal overhead.
Solution Approach 2:
The patent implements periodic action through Semi-Persistent Scheduling where resources are allocated periodically for a configured duration without requiring continuous control signaling. The SPS configuration establishes a periodic transmission pattern that maintains resource allocation efficiency while minimizing control overhead by avoiding repeated scheduling commands for each transmission cycle.
2Object-affected harmful factors
If control region is suppressed for non-backward compatible carriers, then interference to control regions of other cells is reduced, but control channel capacity is limited
Solution Approach 1:
The patent applies segmentation by dividing the control channel capacity allocation across multiple carriers in a carrier aggregation scenario. Instead of suppressing control regions entirely on non-backward compatible carriers, the system segments the control signaling functionality across available carriers, allowing control channel capacity to be distributed and maintained while still managing interference through selective control region configuration.
3Quantity of substance
If Semi-Persistent Scheduling is used for predictable traffic, then control signal overhead is reduced, but adaptability to variable data demands decreases
Solution Approach 1:
The patent applies dynamics by enabling flexible adjustment of SPS parameters including resource allocation size, transmission periodicity, and configuration duration based on actual traffic conditions. The system can dynamically modify SPS configurations or transition between SPS and dynamic scheduling modes, allowing it to adapt to variable data demands while maintaining reduced control overhead benefits for predictable traffic patterns.
Solution Approach 2:
The patent implements parameter changes by allowing modification of key SPS parameters such as resource block allocation, modulation and coding scheme, hybrid ARQ process ID, and scheduling periodicity. These parameter adjustments enable the system to optimize performance for different traffic conditions while maintaining the core SPS benefit of reduced control signaling overhead.
Data Source
AI summary
A method for data transmission, a base station using the same and a user equipment (UE) using the same are proposed. The exemplary embodiments in accordance with the present disclosure implicitly allocate resources with overbooking by configuring M UEs to transmit or receive N protocol data units (PDU) where M>N. The overbooking is accomplished by using a base station to configure Small Data Sub-frame (SDS) for a plurality of UEs and request to process the SDS by sending a radio control message. The UEs would receive from the base station a sub-frame of data with multiple PDUs and perform processing on the PDUs to obtain a belonging data packet according to a candidate packet set and a search order previously embedded in the control message.