What is GBR (guaranteed bit rate)?

A GBR bearer has a ensured bit rate and Maximum Bit Rate. More than one non-GBR bearer belonging to the same UE shares an Aggregate Maximum Bit Rate. Non-GBR bearers can endure packet misfortune under blockage but GBR bearers are resistant to such misfortunes. GBR ensures a minimum bit rate, which is generally tuned to the necessities of the information stream.