Multicast UE Channel Dispersion via Pseudorandom Hashing
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Solution Overview
Problem
In wireless communications networks, there is a need for user equipment (UEs) to efficiently disperse across channels in response to a disperse command to balance load across channels and cells, particularly after multicast/broadcast services, to avoid network overload.
Innovation Solution
The implementation of a system where UEs receive a disperse command and randomly or pseudorandomly select a channel using a hash function, and then select a camping cell based on the channel, ensuring uniform distribution across available channels and cells, thereby balancing the network load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If UEs congregate on a single channel for multicast/broadcast services, then service delivery efficiency is improved, but network load balance deteriorates causing potential overload
Solution Approach 1:
The patent segments the concentrated UE population into multiple groups by assigning different dispersion parameters (offset values) to different UEs. This segmentation causes UEs to disperse across multiple channels and cells rather than congregating on a single channel, thereby maintaining load balance while still enabling efficient multicast/broadcast service delivery to each segment.
Solution Approach 2:
The patent applies local quality by assigning different dispersion parameters to different UEs based on their specific characteristics or conditions. Each UE receives a customized offset value that determines its specific dispersion pattern, allowing tailored load distribution while maintaining overall network balance.
2Loss of information
If UEs use deterministic channel selection, then channel assignment predictability is improved, but uniform distribution across channels deteriorates
Solution Approach 1:
The patent applies preliminary action by pre-calculating and assigning deterministic offset values to UEs before they need to select channels. These offset values are derived from UE-specific parameters (such as UE ID or other identifying information) in advance, ensuring both predictability and uniform distribution without requiring complex real-time calculations.
Solution Approach 2:
The patent changes parameters by transforming UE-specific parameters into channel offset values through deterministic functions. This parameter transformation maintains predictability (since the function is deterministic) while achieving uniform distribution (since different UE parameters map to different offsets across the available channel range).
Data Source
AI summary
Methods, systems and apparatus for dispersing a group of user equipment (UEs) concentrated on a single channel is disclosed. After receiving a disperse command the UEs select a channel, and then select a cell. The channel selection may be performed using a random or pseudorandom function. The cell selection may be performed prior to camping on the cell. Prior to camping the UEs may test the acceptability of a candidate cell and/or may perform a cell reselection. The result of the dispersion is that the UEs are distributed amongst many channels (a, b, c, and d), where reference are found in FIGS. 1A and 1B.