Access Network Partial Packet Transmission for Bandwidth Efficiency
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Solution Overview
Problem
In the 1×EVDO mobile communication system, the existing data transmission methods result in unnecessary bandwidth waste and delayed packet transmission, particularly for real-time data, due to the long transmission formats and scheduling restrictions, which hinder efficient data delivery and resource utilization.
Innovation Solution
The proposed solution involves implementing partial transmission methods, where the access network repeatedly transmits packet data for multiple slots and allows for new packet transmission even if the maximum number of retransmissions is exceeded, enabling efficient scheduling and data delivery by allowing new packet transmission within the maximum number of slots, especially for multiuser packets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the access network uses long transmission formats for packet data to ensure reliable delivery, then transmission reliability is improved, but bandwidth waste increases and transmission delay occurs
Solution Approach 1:
The patent applies partial transmission by sending only a portion of the packet data in the first transmission slot and the remaining portion in subsequent slots. This resolves the contradiction by transmitting the minimum necessary data in each slot rather than using long transmission formats that waste bandwidth, while still ensuring reliable delivery through segmented transmission.
2Reliability
If the access network waits for the maximum number of retransmissions to complete before transmitting new packets, then transmission completeness is ensured, but transmission delay increases and productivity decreases
Solution Approach 1:
The patent enables the access network to transmit new packet data in advance during ongoing retransmission slots before the maximum retransmission count is reached. This preliminary action resolves the contradiction by not waiting for complete retransmission cycles to finish, thereby reducing transmission delay and improving productivity while maintaining reliability through continuous monitoring and completion of necessary retransmissions.
3Reliability
If the access network transmits packet data repeatedly for multiple slots to ensure delivery, then transmission reliability is improved, but scheduling flexibility is reduced
Solution Approach 1:
The patent segments packet data into multiple portions that can be transmitted in different slots independently. This segmentation resolves the contradiction by allowing the access network to transmit different portions of data with different priorities and timing requirements, thereby maintaining scheduling flexibility while ensuring reliable delivery of each segment through repeated transmission opportunities.
Data Source
AI summary
A method and apparatus are provided for receiving, by an access network (AN), reception strength of a forward pilot channel, measured and reported by each access terminal (AT), as forward data rate information, and transmitting packet data to each AT according to the forward data rate information. When the number of repeated transmission slots for packet data transmitted based on the forward data rate information is greater than or equal to two, the AN repeatedly transmits the packet data as many times as the number of slots, which is less than the number of repeated transmission slots, and transmits new packet data through the remaining slots.