Mid-Packet Sector Handoff for Wireless Throughput
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Solution Overview
Problem
Existing wireless communication protocols require access terminals to wait until current packet transmission is complete before handing off to a new sector, even if the new sector can complete transmission in fewer timeslots, leading to inefficiencies in data transfer.
Innovation Solution
An access terminal can abandon packet transmission in the current sector and hand off to a new sector during ongoing transmission if the new sector can complete the packet in fewer timeslots, by determining the allowed timeslots in both sectors and comparing them to decide on a mid-packet handoff.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the access terminal waits until current packet transmission is complete before handing off to another sector, then the handoff process is simplified and reliable, but the data transmission time is increased and communication efficiency is reduced
Solution Approach 1:
The access terminal performs preliminary evaluation of alternative sectors before current packet transmission completes. By assessing signal quality and estimating transmission time for candidate sectors in advance, the terminal prepares handoff decisions proactively, enabling faster execution when handoff becomes necessary without compromising reliability.
Solution Approach 2:
The handoff decision mechanism transitions from static (waiting for transmission completion) to dynamic (continuous monitoring and evaluation during transmission). The terminal dynamically adjusts handoff timing based on real-time signal conditions, allowing optimal handoff points to be selected during ongoing transmission rather than only at predetermined boundaries.
2Productivity
If the access terminal abandons current packet transmission and hands off to a new sector during ongoing transmission, then the data transmission time is reduced and communication efficiency is improved, but the complexity of packet transmission management is increased
Solution Approach 1:
The packet transmission process is segmented into evaluable units where the terminal can assess completion progress and sector performance at intermediate points. By dividing the transmission timeline into monitoring intervals, the terminal can make discrete handoff decisions without managing the entire transmission as a single complex process, reducing decision-making complexity.
Solution Approach 2:
The terminal implements feedback mechanisms to monitor packet transmission progress and sector performance in real-time. This feedback enables the terminal to assess whether continuing with the current sector or switching to an alternative sector is more efficient, providing the information needed for informed handoff decisions without requiring complex predictive modeling.
3Loss of time
If the access terminal continuously monitors and evaluates sector performance during packet transmission, then the timing for handoff optimization is improved, but the energy consumption and processing load are increased
Solution Approach 1:
The terminal performs sector performance evaluation at periodic intervals rather than continuously throughout packet transmission. By sampling sector conditions at regular monitoring points, the terminal achieves sufficient handoff timing optimization while avoiding the excessive energy consumption and processing load that would result from continuous monitoring.
Data Source
AI summary
A method and apparatus for handing off packet-transmission between sectors of a wireless communication system is disclosed herein. During transmission of a packet from an access network to an access terminal, the access terminal determines that the packet should theoretically be transmitted to the access terminal in fewer timeslots in another sector than the number of allowed timeslots remaining for the packet transmission in a current sector. In response, the access terminal abandons packet transmission in the current sector and hands off to the other sector, in an effort to increase throughput and save air interface resources.