Uplink Contention Slot Allocation for Public Safety Priority
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Solution Overview
Problem
In wireless communication systems, public safety devices often face contention for bandwidth resources with standard subscriber devices, leading to potential delays and reduced priority in bandwidth allocation, which can impact the reliability and efficiency of critical communications.
Innovation Solution
The method involves dynamically allocating separate and non-overlapping contention slots for public safety devices and standard subscriber devices, with public safety devices having exclusive access to specific contention slots to ensure higher priority and efficient bandwidth allocation based on load factors and bandwidth request rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If public safety devices share bandwidth contention slots with standard subscriber devices, then resource utilization is improved, but priority and reliability of public safety communications deteriorate
Solution Approach 1:
The patent segments the bandwidth contention slots into two distinct sets: a first set allocated exclusively for public safety devices and a second set allocated for standard subscriber devices. This segmentation ensures that public safety communications do not share contention slots with standard subscribers, thereby maintaining their priority and reliability while still allowing efficient resource utilization through dedicated allocation.
2Reliability
If separate contention slots are allocated for public safety and standard subscriber devices, then priority and reliability of public safety communications are improved, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by having the base station pre-allocate and communicate the first set of bandwidth contention slots to public safety devices and the second set to standard subscriber devices before actual communication occurs. This preliminary allocation and communication of slot sets simplifies the management complexity by establishing clear, pre-defined rules for slot usage, eliminating the need for real-time complex negotiation or dynamic reassignment.
3Ease of operation
If public safety devices use shared contention slots, then ease of operation is improved, but bandwidth allocation timing and efficiency deteriorate
Solution Approach 1:
By segmenting the contention slots into dedicated first set for public safety devices and second set for standard subscribers, the patent eliminates collisions and waiting times associated with shared slot access. Public safety devices can immediately transmit bandwidth requests in their dedicated slots without waiting for turn-taking or competing with standard subscribers, thereby reducing allocation delay while maintaining operational simplicity through structured access rules.
Data Source
AI summary
A first set of uplink contention slots is allocated for use by a first set of devices. A second set of uplink contention slots is allocated for use by a second set of devices. The first set of uplink contention slots and the second set of uplink contention slots may or may not share contention slots. The first set of uplink contention slots is communicated to the first set of devices. The second set of uplink contention slots is communicated to the second set of devices.