CDMA Trunking Paging Synchronization for Reduced Call Setup Time
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Solution Overview
Problem
In CDMA trunking communication systems, the existing minimum time slot paging cycle is not compatible with all terminals, leading to prolonged paging times that do not meet the quick access requirements of trunking systems, and existing solutions are not supported by trunking terminals or systems.
Innovation Solution
A method that synchronizes minus time slot paging cycles between trunking terminals and the core network, allowing the calculation and transmission of paging time slots based on available minus time slot cycles, ensuring compatibility and reducing paging duration without affecting existing network users or terminal standby times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the minimum time slot paging cycle (0/1.28 seconds) is used in existing CDMA systems, then the paging channel monitoring is synchronized, but the paging time becomes too long to meet the quick access requirements of trunking systems
Solution Approach 1:
The patent introduces a new parameter 'minus time slot' for the paging cycle, which allows the paging time slot to be advanced before the current time slot completes. This parameter change enables the paging cycle to be shorter than the traditional minimum of 1.28 seconds, directly reducing the paging time while maintaining system synchronization through coordinated updates between terminals and the network.
2Loss of time
If the minus time slot paging cycle is implemented, then the paging time is shortened, but the compatibility with existing trunking terminals and systems is lost
Solution Approach 1:
The patent implements a dynamic synchronization mechanism where the minus time slot paging cycle is updated progressively. The system allows terminals to adopt the new paging cycle dynamically through network signaling, rather than requiring all terminals to support it simultaneously. This dynamic approach enables backward compatibility while gradually introducing the improved paging speed capability.
Solution Approach 2:
The patent performs preliminary synchronization of the minus time slot paging cycle between the network and terminals before actual paging operations. By pre-configuring and synchronizing the new paging cycle parameters, the system ensures that both existing and new terminals can operate correctly without disruption, maintaining compatibility while enabling the shortened paging time functionality.
3Stability of the object's composition
If the paging time slot is synchronized from trunking terminals to the system, then the synchronization is maintained, but the compatibility of old trunking terminals cannot be achieved
Solution Approach 1:
The patent inverts the traditional synchronization direction by having the network synchronize the minus time slot paging cycle to terminals, rather than terminals synchronizing to the system. This inversion allows the network to control and coordinate the adoption of the new paging cycle, ensuring that all terminals (both old and new) remain synchronized while enabling the shortened paging time functionality.
Data Source
AI summary
The present invention discloses a method for improving paging speed of a called user in CDMA trunking system. For a first trunking terminal supporting minus time slot call manner, said method includes: it makes minus time slot paging cycles of the first trunking terminal and a trunking core network keep synchronous; the first trunking terminal selects a minus time slot paging cycle to calculate a paging time slot according to the presence of its own minus time slot paging cycle and the presence of a minus time slot paging cycle contained in an overhead message of a call channel, and monitors the call channel on the calculated paging time slot; the base station system selects a minus time slot paging cycle to calculate a paging time slot of the user according to the presence of its own minus time slot paging cycle and the presence of a minus time slot paging cycle contained in a paging request message, and transmits a paging message on the call channel according to the calculated paging time slot. The method of the present invention effectively shortens the duration of establishment of a trunking call, and simultaneously maintains the compatibility for the existing trunking terminals.