Parallel Connection Setup for Push-to-Talk Wireless Systems
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Solution Overview
Problem
Current 1xEV-DO connection setup protocols in wireless networks are serial, resulting in noticeable and undesirable delays during push-to-talk (PTT) sessions due to the sequential nature of the process, which is inefficient for voice transmissions that require faster connection speeds.
Innovation Solution
Implementing a method to perform certain steps in parallel, such as sending a reverse traffic channel acknowledgement (RTCACK) before a desired access network serving sector is fully acquired, and allowing user traffic to begin transmission before the DRC channel is fully acquired, thereby reducing connection setup time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a serial connection setup protocol is used, then reliability is maintained, but connection setup time increases
Solution Approach 1:
The patent performs preliminary actions by sending the Reverse Traffic Channel Acknowledgement (RTCA CK) before the Desired Sector is fully acquired. The system sends TCA messages and begins acquiring DRC channels in parallel, rather than waiting for complete acquisition. This allows the connection setup to proceed faster while maintaining reliability through subsequent confirmation steps.
Solution Approach 2:
The patent maintains continuity of useful action by keeping multiple processes running simultaneously: sending TCA messages, acquiring DRC channels, and sending RTCACK indications all occur in parallel rather than sequentially. This continuous parallel processing reduces overall connection setup time while ensuring reliability through proper protocol completion.
2Loss of time
If parallel processing is implemented, then connection setup time is reduced, but system complexity increases
Solution Approach 1:
The patent segments the connection setup protocol into distinct parallel processes: TCA message sending, DRC channel acquisition, and RTCACK indication transmission. Each segment can be processed independently and simultaneously, reducing overall setup time while managing complexity through modular organization of protocol steps.
Data Source
AI summary
A method of connection setup in mobile wireless data communications systems is disclosed where the connection setup time is decreased for delay-sensitive communications sessions relative to the normal connection setup time for confidence-dependent communications sessions. This is achieved by performing some of the connection set-up steps for delay-sensitive communications sessions after successfully demodulating a smaller number of indications identifying an access terminal's desired serving resource than would be demodulated in the case of a confidence-dependent communication session prior to performing the same connection set-up steps.