Enhanced Random Access Channel Timing Advance for Signaling Overhead Reduction
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Solution Overview
Problem
Wireless communication networks face significant signaling overhead and delay issues, particularly for smaller data transfers, due to conventional bandwidth request and allocation processes.
Innovation Solution
The implementation of an enhanced random-access channel (RACH) with a known timing advance allows for efficient transmission of small data transfers by reducing signaling overhead and delay, using a shortened identifier and normal-burst format, and eliminating the need for prior connection or uplink bandwidth allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional bandwidth request and allocation process is used, then reliable data transmission is ensured, but signaling overhead becomes significant for smaller data transfers
Solution Approach 1:
The patent extracts and eliminates the conventional bandwidth request and allocation signaling process from the data transmission procedure. By using an enhanced random access channel that allows direct data transmission without prior bandwidth negotiation, the patent removes the source of excessive signaling overhead while maintaining transmission reliability through alternative mechanisms such as collision detection and network destination address validation.
Solution Approach 2:
The enhanced random access channel serves multiple functions simultaneously: it provides initial access, carries data directly, and enables collision detection. This multi-functional approach consolidates what would traditionally require separate signaling and data transmission phases into a single efficient process, reducing overall signaling overhead.
2Reliability
If conventional bandwidth request and allocation process is used, then proper channel allocation is achieved, but delay becomes significant for smaller data transfers
Solution Approach 1:
The patent performs preliminary actions by pre-configuring the enhanced random access channel with known timing advance information and pre-establishing the capability for direct data transmission. This allows the mobile station to immediately begin data transmission without undergoing time-consuming bandwidth request and allocation procedures, thereby reducing delay while maintaining proper channel allocation through the pre-configured channel parameters.
Solution Approach 2:
The patent skips the conventional intermediate steps of bandwidth request and allocation by enabling direct data transmission on the enhanced random access channel. This rushing through of the traditional multi-step process achieves both fast transmission for small data and proper channel allocation through the enhanced channel's built-in allocation mechanisms.
3Quantity of substance
If enhanced random access channel with known timing advance is used, then signaling overhead is reduced, but collision risk increases
Solution Approach 1:
The patent implements feedback mechanisms through collision detection procedures where the network monitors the enhanced random access channel for collisions. When collisions are detected, the network provides feedback to mobile stations about channel availability and transmission status, allowing them to adjust their transmission attempts and reduce collision risk while maintaining the overhead-efficient direct transmission mode.
Solution Approach 2:
The patent introduces dynamic adjustments to the enhanced random access channel operation based on real-time network conditions. The channel parameters and access opportunities are dynamically modified based on collision detection results and network load, allowing the system to adapt to changing conditions and reduce collision risk while preserving the low-overhead advantage.
Data Source
AI summary
Example communication stations and methods for transmitting additional information on an enhanced random access channel (RACH) are disclosed herein. An example method performed by a device involves generating an initial access burst for transmission on an enhanced RACH and transmitting the initial access burst using a timing advance. The timing advance is to cause the initial access burst to be received at the network within a single time slot of the enhanced RACH. The initial access burst includes at least one of information about capabilities of the device or information identifying the device. The example method also involves receiving a temporary block flow (TBF) assignment from the network in response to sending the at least one of the information about the capabilities of the device or the information identifying the device.