Wireless Device Access Probe Delay Prioritization
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Solution Overview
Problem
In CDMA wireless communication networks, access probes from wireless devices often collide at the base station, leading to prioritization issues where earlier received data is handled at the detriment of other devices, necessitating a solution to prioritize handling of access probes effectively.
Innovation Solution
The system and method involve a wireless communication device that dynamically adjusts the transmission delay of access probes to ensure higher priority probes arrive earlier in slots at the base station, utilizing a slotted access protocol with predetermined delays and potentially additional PN randomization to avoid collisions, thereby prioritizing their handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wireless communication devices send access probes simultaneously in slotted access protocol, then the access channel utilization is improved, but data collisions occur at the base station
Solution Approach 1:
The patent applies preliminary action by having wireless communication devices send indication signals before transmitting access probes. These indication signals allow the base station to pre-allocate resources and determine reception priorities before the actual data transmission occurs, preventing collisions in advance while maintaining high channel utilization.
Solution Approach 2:
The patent segments the access process into two distinct phases: an indication signal transmission phase and an access probe transmission phase. This segmentation allows the base station to process priority information separately before handling the actual data probes, reducing collisions by organizing transmissions in structured time slots.
2Device complexity
If access probes are handled in the order received at the base station, then the processing simplicity is improved, but higher priority probes may be delayed
Solution Approach 1:
The patent resolves this contradiction by performing preliminary prioritization through indication signals sent before access probes. The base station determines reception priorities in advance based on these indication signals, so when access probes arrive, they can be handled according to pre-determined priorities rather than simple reception order, reducing delay for high-priority probes without significantly increasing processing complexity.
3Speed
If transmission delay is reduced for faster access, then the access speed is improved, but collision probability increases
Solution Approach 1:
The patent allows devices to send indication signals in advance without delaying the actual access probe transmission. This preliminary action provides the base station with priority information before the probe arrives, enabling fast handling of high-priority probes while reducing collision probability through proactive resource allocation and priority determination.
Data Source
AI summary
A wireless communication device that prioritizes the receipt of access probes within the slots of a base station having a slotted access protocol for incoming communications from wireless communication devices, where the slotted access protocol includes a plurality of discrete slots in which communication packets from wireless communication devices are received and communication packets arriving earlier in a slot are handled first by the base station. The wireless communication device can statically or dynamically change a predetermined delay in sending the access probe to insure it arrives earlier or later in a slot so as to cause a priority of handling by the base station.