UE RF Band Advertising Filter for Faster Network Attachment
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Solution Overview
Problem
The unnecessary advertisement of all supported RF bands by a User Equipment (UE) consumes resources and delays attachment to a wireless communication system, as some cells may not process large messages, leading to rejection and further delays.
Innovation Solution
The UE reduces the set of advertised RF bands based on its physical location and the network's country code, omitting unsupported bands to transmit a reduced set of supported bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE advertises all supported RF bands, then the advertisement is comprehensive and ensures compatibility with any network, but the advertisement size increases consuming more wireless resources and time
Solution Approach 1:
The UE performs preliminary filtering of RF bands by comparing its supported bands against the network's advertised bands before sending the capability advertisement. This preliminary action removes bands that the network does not support, reducing advertisement size and attachment time while ensuring the advertised bands are compatible with the network
Solution Approach 2:
The UE extracts only the relevant subset of RF bands from its full supported set by filtering out bands that the network does not support. This extraction process creates a minimized advertisement containing only the intersection of UE-supported and network-supported bands, eliminating unnecessary information
2Adaptability or versatility
If the UE advertises all supported RF bands, then the advertisement includes all possible bands for any location, but the message size exceeds processing limits of certain cells causing rejection
Solution Approach 1:
The UE performs preliminary filtering of RF bands by comparing its supported bands against the network's advertised bands before sending the capability advertisement. This preliminary action removes bands that the network does not support, reducing advertisement size and attachment time while ensuring the advertised bands are compatible with the network
Solution Approach 2:
The UE extracts only the relevant subset of RF bands from its full supported set by filtering out bands that the network does not support. This extraction process creates a minimized advertisement containing only the intersection of UE-supported and network-supported bands, eliminating unnecessary information
3Loss of information
If the UE advertises all supported RF bands, then the UE maintains full capability information, but wireless bandwidth is consumed needlessly
Solution Approach 1:
The UE performs preliminary filtering of RF bands by comparing its supported bands against the network's advertised bands before sending the capability advertisement. This preliminary action removes bands that the network does not support, reducing advertisement size and attachment time while ensuring the advertised bands are compatible with the network
Solution Approach 2:
The UE extracts only the relevant subset of RF bands from its full supported set by filtering out bands that the network does not support. This extraction process creates a minimized advertisement containing only the intersection of UE-supported and network-supported bands, eliminating unnecessary information
Data Source
AI summary
A User Equipment (UE) (102) supports a plurality of RF bands (132) associated with a plurality of country codes. The UE (102) reduces the entirety of the set of UE-supported RF bands (132) based on a current, physical location (115) of the UE (102), and the UE (102) advertises only the reduced set of UE-supported RF bands to a network or wireless communication system (100), e.g., for attachment purposes. For example, the UE (102) may reduce the entirety of the set of RF bands that it supports (132) based on a country code provided by a base station (105, 108) of a network (100) and the physical location (115) of the UE (102), thereby generating a reduced set of UE-supported RF bands. Subsequently, the UE (102) may advertise only the reduced set of RF bands supported by the UE (102), and refrain from advertising one or more RF bands excluded from the reduced set, e.g., by omitting any indication of the excluded RF bands from advertisements.