CDMA-2000 Data Session Setup with Air Link Verification
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Solution Overview
Problem
In CDMA-2000 wireless communication networks, the establishment of data sessions is often delayed due to the premature transmission of configuration requests before the radio air link is established, leading to lost packets and increased session establishment times, which current protocols fail to adequately address.
Innovation Solution
Implementing time and signal-based triggers to optimize the timing of configuration request signals from packet data servers to mobile subscribers, including wait periods to ensure the air link is established before sending configuration requests, and buffering data packets to prevent loss during this process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If configuration requests are sent immediately after data session registration, then the response time appears fast, but the configuration requests are lost due to premature transmission before air link establishment, resulting in increased session establishment time
Solution Approach 1:
The patent implements a wait time period mechanism that delays the transmission of configuration requests until after the air link is established. This preliminary waiting action ensures that the transmission path is ready before data is sent, preventing packet loss while maintaining efficient session establishment. The packet data server refrains from sending configuration requests during this wait period, optimizing both timing and reliability.
2Reliability
If wait time periods are introduced to ensure air link establishment before configuration request transmission, then configuration delivery reliability improves, but session establishment time increases
Solution Approach 1:
The patent replaces the traditional mechanical timing mechanism with signal-based triggers. Instead of using fixed wait times, the system uses triggers such as air link establishment signals to dynamically determine when to send configuration requests. This substitution allows the system to adapt to actual network conditions, reducing unnecessary waiting time while ensuring reliable delivery only when the air link is confirmed established.
3Loss of time
If configuration requests are sent before air link establishment, then transmission delay is minimized, but data packets are lost due to premature transmission
Solution Approach 1:
The patent introduces an intermediary mechanism in the form of a buffer or queue at the packet data server. This intermediary holds configuration requests and data packets temporarily, releasing them only after the air link is established. This mediator prevents premature transmission losses while minimizing delay by holding packets only for the necessary wait time period, rather than using fixed or excessive delays.
Data Source
AI summary
Systems and methods for establishing and operating data sessions between mobile subscriber units and packet data servers on a wireless communication network are presented. Some aspects described herein are directed to preventing the loss of an initial configuration request signal (e.g. under the LCP protocol) from a packet data server to a mobile subscriber prior to successful establishment of a radio air link to the mobile subscriber. Other aspects are directed to detecting the presence or absence of a radio air link to the mobile subscriber as a determinant of whether the packet data server is to send a configuration request signal to the mobile subscriber, or whether the packet data server should withhold the request signal until the air link is established. Some or all aspects presented are suitable for use in 3G or CDMA-2000 systems using the A10/A11 communication control protocol and the PPP data communication protocol.