Autonomous Reverse Link Data Transmission in Wireless Networks
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Solution Overview
Problem
Traditional wireless communication protocols, such as CDMA 2000, require slow and bandwidth-consuming scheduling processes for packet data transmission over reverse links, leading to delays and inefficient use of bandwidth in mobile communications networks.
Innovation Solution
Implementing an autonomous mode in wireless communications networks that allows mobile stations to transmit data at a rate up to a specified maximum autonomous data rate without explicit scheduling by the base station, using indicators like REV_PDCH_MAX_AUTO_TPRS and REV_PDCH_AUTO_ALLOWEDS, enabling mobile stations to send data without waiting for scheduler assignments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional scheduling protocols are used for packet data transmission, then the base station can control the transmission process, but the transmission delay increases and bandwidth is consumed
Solution Approach 1:
The base station performs preliminary actions by pre-allocating resource blocks and configuring transmission parameters before the mobile station needs to transmit data. The base station sends scheduling information including resource block assignments and transmission parameters in advance, allowing the mobile station to prepare transmission buffers and immediately begin data transmission without waiting for real-time scheduling decisions, thereby reducing transmission delay while maintaining base station control
Solution Approach 2:
The transmission process is segmented into control phase and data transmission phase. The control phase involves the base station sending scheduling information and resource block assignments, while the data transmission phase allows the mobile station to transmit data independently using pre-configured parameters. This segmentation separates the control function from the data transmission function, reducing the time required for complete scheduling while maintaining reliability
2Reliability
If traditional scheduling protocols are used for packet data transmission, then the base station can manage the channel, but valuable bandwidth is consumed during scheduling signaling
Solution Approach 1:
The base station performs preliminary channel management by pre-allocating resource blocks and sending scheduling information in advance. The scheduling information includes resource block assignments, transmission parameters, and power control settings that are configured before data transmission begins. This preliminary configuration reduces the need for continuous bandwidth-consuming signaling during data transmission, as the mobile station can operate autonomously using pre-configured parameters
Solution Approach 2:
The scheduling signaling function is extracted from the continuous data transmission process. The base station sends all necessary scheduling information and resource block assignments in a preliminary control phase, then the mobile station transmits data independently without requiring continuous scheduling signaling. This extraction separates the control function (performed by base station) from the data transmission function (performed by mobile station), significantly reducing bandwidth consumption during data transmission while maintaining effective channel management
Data Source
AI summary
A wireless communications network includes a mobile station and base station communicating an indicator of an autonomous data rate supportable over a reverse wireless link between the mobile station and base station. The mobile station and base station also communicate a flag indicating whether autonomous is enabled for the mobile station. In response to the flag indicating that autonomous mode is enabled, data is communicated, over the reverse wireless link, at a data rate less than or equal to the autonomous data rate without the base station having to first schedule the mobile station.