Uplink Channel Selection for Wireless Devices
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Solution Overview
Problem
Current wireless networks lack a mechanism to balance the uplink load between the Physical Random Access Channel (PRACH) and the Enhanced Dedicated Channel (E-DCH) resources for wireless devices in the CELL_FACH state, leading to potential call blocking and inefficient resource utilization, especially with the increasing data traffic from smart phones and machine-type communications.
Innovation Solution
A method for a wireless device to selectively choose between the PRACH and E-DCH uplink channels based on the type of data being transmitted or its identity, allowing for efficient allocation of resources and balancing the load between the two channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wireless devices in CELL_FACH state use a single uplink channel (PRACH or E-DCH), then the channel allocation is simple, but the uplink load cannot be balanced leading to call blocking and inefficient resource utilization
Solution Approach 1:
The invention segments the uplink channel selection by dividing data types into control data and user data. Control data is transmitted via PRACH while user data is transmitted via E-DCH. This segmentation allows the system to balance uplink load between the two channels without requiring complex dynamic selection mechanisms, thereby improving resource utilization while maintaining relatively simple device complexity.
2Reliability
If all wireless devices use the same uplink channel regardless of data type, then the channel allocation mechanism is simple, but the likelihood of call blocking increases due to unbalanced load
Solution Approach 1:
The invention applies local quality by assigning different channel selection criteria to different data types. Control data (requiring reliable delivery for signaling) uses PRACH, while user data (tolerating some delay) uses E-DCH. This localized differentiation improves call blocking probability by balancing load on each channel type without requiring complex global coordination mechanisms.
3Productivity
If wireless devices dynamically select channels based on real-time conditions, then resource allocation efficiency improves, but power consumption increases due to continuous monitoring and decision-making
Solution Approach 1:
The invention implements preliminary action by pre-configuring channel selection rules based on data type classification. Instead of dynamically monitoring real-time channel conditions and making complex decisions, the device simply checks whether the data is control data or user data and selects the corresponding channel according to pre-established rules. This reduces power consumption while maintaining resource allocation efficiency.
4Adaptability or versatility
If the network provides only basic channel allocation, then the network signaling load is low, but the ability to handle diverse traffic types (smartphone data, machine-type communications) is insufficient
Solution Approach 1:
The invention applies universality by creating a channel selection mechanism that handles multiple traffic types (smartphone data, machine-type communications, control data, user data) through a unified rule-based approach. The same simple mechanism of classifying data type and selecting corresponding channel works across all traffic types, providing adaptability without significantly increasing device complexity or network signaling load.
Data Source
AI summary
First and second wireless transmission protocol uplink channels are available for use by a wireless device in transmitting data to a network. In various examples, the device selects between the first and second wireless transmission protocol uplink channels according to various different criteria. Examples include selecting between the first and second wireless transmission protocol uplink channels according to the type of data to be transmitted and according to the identity of the device, and various combinations of these.