Connectionless Small Data Transmission via Preamble Sequences
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Solution Overview
Problem
Current LTE wireless communication systems face inefficiencies in resource utilization and increased overhead due to the need for establishing and maintaining RRC connections for small data transactions, particularly in Machine-to-Machine communications, leading to suboptimal user performance and increased pressure on network resources.
Innovation Solution
A connectionless data transmission methodology is introduced, where a UE selects specific preamble sequences to indicate small data transactions, allowing the eNB to allocate appropriate RF resources without setting up a full RRC connection, optimizing resource usage and reducing signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a full RRC connection is established for small data transactions, then reliable data transmission is ensured, but signaling overhead and resource consumption increase significantly
Solution Approach 1:
The patent segments the RRC connection establishment process into two distinct procedures: a simplified connectionless procedure for small data transactions (below threshold) and a full connection procedure for large data transactions. This segmentation allows the system to use appropriate complexity levels for different data sizes, reducing overhead for small transactions while maintaining reliability for large ones.
Solution Approach 2:
For small data transactions, the patent applies partial action by establishing only the necessary minimal connection components (using preamble sequences and basic RACH procedures) rather than full RRC connections. This partial connection approach provides sufficient functionality for small data while avoiding the excessive complexity of full connection setup.
2Productivity
If RRC connections are maintained for small data transactions, then data transmission capability is ensured, but network resource utilization deteriorates
Solution Approach 1:
The patent segments data transactions into small (below threshold) and large (above threshold) categories, applying different handling mechanisms to each. Small transactions use connectionless preamble-based procedures that consume minimal network resources, while large transactions use full RRC connection procedures. This segmentation optimizes network resource utilization by matching the handling complexity to the data size requirements.
Solution Approach 2:
The patent changes the connection establishment parameter based on data size threshold. When data size is below the threshold, the system uses connectionless preamble sequences; when above the threshold, it establishes full RRC connections. This parameter change approach allows the network to adapt its resource allocation strategy dynamically based on transaction size, improving overall resource utilization efficiency.
3Use of energy by moving object
If MAC-DRX is used to save UE battery, then energy consumption is reduced, but eNB processing load and handover activities increase
Solution Approach 1:
Instead of having the UE periodically wake up to check for data (传统 DRX approach), the patent inverts the approach by having the eNB proactively identify small data transactions and initiate connectionless transmission using preamble sequences. This inversion shifts the complexity from UE-side periodic waking to eNB-side proactive identification, reducing UE battery consumption while managing eNB processing through efficient preamble-based protocols.
Data Source
AI summary
For applications with very small data activities, connection of a UE to a wireless network for sending or receiving such small data traffic increments via conventional connection set-up processes is quite inefficient in terms of spectral resource utilization. The invention provides a new connectionless methodology for transmission of such small data increments between a UE and a serving eNB. In particular, the invention methodology contemplates identifying a set of preamble sequences among the pool of preamble sequences provided for access requests from a UE to an eNB via the Random Access Channel as corresponding to a request from the UE for access to transmit an increment of data smaller than a predetermined threshold data size. When a UE has data traffic to transmit of a size smaller than the predetermined threshold size, it selects one of the preamble sequences in the identified set and sends an access request, using the selected preamble sequence, to a serving eNB via the Random Access Channel. Upon receipt of the access request from the UE, the eNB determines an appropriate RF resource for the data increment sought to be transmitted by the UE, based on the use of the selected preamble sequence sent by the UE, and schedules an uplink connection for the transmission of that data increment by the UE.