Negotiated Packet Sizes for Reverse Link Efficiency
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Solution Overview
Problem
Current cellular communication systems face inefficiencies in reverse link data transmission, particularly for delay-sensitive applications, due to predefined packet size limitations, leading to additional delay or spectral waste, and require methods to improve packing and spectral efficiency while maintaining backward compatibility.
Innovation Solution
A method for negotiating a set of allowable data traffic packet sizes on the reverse link between a wireless access terminal and a radio network, allowing for customized packet sizes different from the default set, enabling efficient data transmission by determining desired packet sizes based on parameters and negotiating these with the network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a smallest predefined packet size larger than the application packet size is selected, then packing efficiency is improved, but transmission delay increases due to waiting to assemble multiple packets
Solution Approach 1:
The system dynamically negotiates packet sizes between the access terminal and radio network based on actual traffic characteristics. The access terminal requests a customized packet size set, and the network responds with a negotiated set that optimizes both spectral efficiency and transmission delay for the specific application traffic pattern.
Solution Approach 2:
The invention changes the packet size parameter from fixed predefined values to negotiable customized values. By allowing the packet size to be dynamically adjusted through negotiation between terminal and network, the system can optimize the balance between packing efficiency and transmission delay for each specific traffic condition.
2Loss of time
If application packets are stuffed into larger size air interface packets, then transmission delay is reduced, but spectral efficiency decreases due to wasted stuffed bits
Solution Approach 1:
The system changes the packet size parameter to match the actual application traffic characteristics. Instead of using fixed larger packets that cause wasting, the negotiated packet sizes are customized to fit the actual traffic pattern, eliminating wasted bits while maintaining low delay.
Solution Approach 2:
The negotiation process incorporates feedback mechanisms where the access terminal provides information about its traffic characteristics, and the radio network responds with appropriate packet size settings. This feedback loop ensures optimal packet sizing that prevents both delay and spectral waste.
3Reliability
If predefined packet sizes are used for reverse link transmission, then system compatibility is maintained, but packing efficiency decreases for delay-sensitive applications
Solution Approach 1:
The system maintains universality by allowing both legacy terminals using predefined packet sizes and advanced terminals using negotiated customized packet sizes to coexist on the network. The radio network is designed to handle both modes, ensuring backward compatibility while enabling improved efficiency for capable devices.
Solution Approach 2:
The packet size configuration is made dynamic rather than static. The system can adapt between using standard predefined sizes for compatibility and negotiated customized sizes for efficiency, based on the capabilities and needs of individual access terminals and their traffic characteristics.
Data Source
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AI summary
An access terminal (AT) and a data-optimized cellular communication radio network (RN) negotiate a set of packet sizes for use on a reverse link between the AT and the RN. The negotiated set of packet sizes may differ from the default set of packet sizes defined in an existing standard, such as 1xEV-DO Revisions A and B. The packet sizes in the negotiated set may be tailored to provide a good fit with an application transmitting data on the reverse link, such as a voice encoder of a voice over Internet Protocol (VoIP) application. The AT and the RN communicate using the negotiated set of packet sizes. The packet sizes of the negotiated set may be mapped to the same reverse rate indicator (RRI) channel codewords as are defined in systems operating under the standard. Packing efficiency is thus increased, and higher capacity for delay-sensitive applications is achieved.