Wireless Access Probe Scrambling for Reduced Contention
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Solution Overview
Problem
Wireless communication systems face challenges in achieving fast and efficient resource access, particularly in minimizing data transmission on the random access channel (RACH) while ensuring short access delays and reducing contention probabilities.
Innovation Solution
The method involves transmitting an access probe with quality of service information on a random access channel, generating an access grant in response, and scrambling it using information from the access probe, allowing for efficient resource allocation and minimizing contention by using a null portion of the access grant and MAC ID management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If traditional random access channel procedures are used, then connection establishment is possible, but access delays are excessive and contention probabilities are high
Solution Approach 1:
The patent applies preliminary action by having the terminal transmit quality of service information and MAC ID in the access probe message before the network responds with resource allocation. This allows the network to pre-evaluate resource availability and make faster allocation decisions, reducing overall access delay while maintaining reliable connection establishment.
Solution Approach 2:
The patent changes the parameter structure of the access probe by including quality of service information and MAC ID, and modifies the access grant to include a null portion for efficient resource allocation. These parameter changes enable faster processing and reduce contention probability by providing more information upfront for resource evaluation.
2Manufacturing precision
If more data is transmitted on the random access channel, then resource allocation accuracy improves, but channel utilization efficiency decreases
Solution Approach 1:
The patent extracts only the essential information (quality of service information and MAC ID) needed for resource allocation and places it in the access probe, while leaving the actual data transmission for later on dedicated channels. This minimizes RACH data transmission while maintaining sufficient information for accurate resource allocation.
Solution Approach 2:
The terminal self-services by including its MAC ID and quality of service requirements in the access probe, allowing the network to make allocation decisions based on this pre-provided information without requiring additional back-and-forth messaging, thus improving both accuracy and efficiency.
3Manufacturing precision
If access grant includes complete resource allocation information, then resource assignment is accurate, but message size increases transmission overhead
Solution Approach 1:
The patent segments the resource allocation information by placing only essential parameters in the access grant message and using a null portion for efficient allocation. The complete resource assignment is delivered in subsequent dedicated channel messages, reducing the size of the initial access grant while maintaining accurate resource assignment.
Data Source
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AI summary
Systems and methodologies are described that facilitate a fast access in a wireless communication system, such as OFDMA. According to various aspects, the system and methods are described for transmitting an access probe, receiving a first grant message, wherein the first grant message comprises a portion representing a first identification, transmitting a message using a second identification, wherein the second identification is not equal to the first identification. Also, generating an access grant in response to receiving the access probe wherein the access grant comprising a portion representing a first identification.