Traffic Channel Assignment Message Transmission in EV-DO Networks
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Solution Overview
Problem
In wireless access networks using the EV-DO air interface protocol, the latency associated with traffic channel assignment (TCA) messages can impact communication session setup and quality of service, particularly for sessions sensitive to delays, as frequent transmissions of TCA messages increase control channel occupancy, potentially reducing data throughput and quality of service.
Innovation Solution
A method and system that determine whether a communication session requires priority service and adjust the selection of capsules for TCA message transmission based on factors like control channel occupancy and the number of sectors in a route update message, using subroutines to optimize the inclusion of TCA messages in synchronous and asynchronous capsules to minimize latency while managing network resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If TCA messages are transmitted more frequently and/or from multiple sources, then the latency for delivering TCA messages is reduced, but the control channel occupancy increases, reducing data throughput and quality of service
Solution Approach 1:
The patent applies local quality by differentiating TCA message transmission strategies based on the specific characteristics of communication sessions. Priority sessions receive enhanced transmission (both synchronous and asynchronous capsules) while non-priority sessions receive standard transmission (asynchronous only), allowing optimized resource allocation for different service requirements without uniformly increasing control channel occupancy across all sessions
Solution Approach 2:
The patent implements dynamics by making the TCA message transmission strategy adaptive based on session priority determination. The system dynamically selects between different transmission modes (priority vs. non-priority subroutines) depending on the real-time characteristics of each communication session, enabling flexible resource management that responds to changing network conditions and service requirements
2Reliability
If TCA messages are sent in both synchronous and asynchronous capsules for priority sessions, then the reliability of TCA message delivery is improved, but the control channel occupancy increases
Solution Approach 1:
The patent applies local quality by providing enhanced reliability only to priority communication sessions that require it, while standard sessions receive basic reliability treatment. This selective approach ensures that the additional control channel occupancy from dual capsule transmission is confined to only those sessions where high reliability is critical, rather than being applied universally to all sessions
Data Source
AI summary
Disclosed herein is a method for selecting one or more capsules in which to include a traffic channel assignment message. The method may be carried out in a wireless communication network that provides wireless service in a coverage area, wherein the coverage area comprises a plurality of sectors, wherein a control channel is provided in each sector, and wherein the wireless communication network is configured to transmit synchronous capsules and asynchronous capsules in each control channel. The method may comprise: (a) receiving a request from an access terminal to engage in a communication session; (b) making a determination of whether or not the requested communication session is of a type that is designated for priority service; (c) using the determination of whether or not the requested communication session is of a type that is designated for priority service as a basis for selecting one or more capsules in which to include the traffic channel assignment message; and (d) transmitting each of the selected capsules, wherein each of the selected capsules comprises the traffic channel assignment message.