Management of security contexts at idle mode mobility between different wireless communication systems
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsChristine Jost, Noamen Ben Henda, Vesa Torvinen, Monica Wifvesson
Life of this patent
Estimating the term…
Abstract
There is provided a solution for managing security contexts at idle mode mobility of a wireless communication device between different wireless communication systems including a first wireless communication system and a second wireless communication system. The first wireless communication system is a 5G/NGS system and the second wireless communication system is a 4G/EPS system. The solution is based on obtaining (S1) a 5G/NGS security context, and mapping (S2) the 5G/NGS security context to a 4G/EPS security context.
Claims19
A method for managing security contexts at idle mode mobility of a wireless communication device between different wireless communication systems including a first wireless communication system and a second wireless communication system, wherein the first wireless communication system is a 5G/Next Generation System, 5G/NGS, system, and the second wireless communication system is a 4G/Evolved Packet System, 4G/EPS, system, wherein the 5G/NGS system is a source system and the 4G/EPS system is a target system during idle mode mobility, and said method comprising:
- obtaining (S1) a 5G/NGS security context, including at least one 5G/NGS security key, and
- mapping (S2) the 5G/NGS security context to a 4G/EPS security context, comprising
- deriving (S2-1) at least one 4G/EPS security key based on the 5G/NGS security key(s),
- wherein the 4G/EPS security context comprises the 4G/EPS security key(s).
An arrangement configured to manage security contexts at idle mode mobility of a wireless communication device between different wireless communication systems including a first wireless communication system and a second wireless communication system,
- wherein the first wireless communication system is a 5G/NGS system and the second wireless communication system is a 4G/EPS system, wherein the 5G/NGS system is a source system and the 4G/EPS system is a target system during idle mode mobility;
- wherein the arrangement is configured to obtain a 5G/NGS security context, including at least one 5G/NGS security key, and
- wherein the arrangement is configured to map the 5G/NGS security context to a 4G/EPS security context, comprising deriving at least one 4G/EPS security key based on the 5G/NGS security key(s), wherein the 4G/EPS security context comprises the 4G/EPS security key(s).
An apparatus configured to manage security contexts at idle mode mobility of a wireless communication device between different wireless communication systems including a first wireless communication system and a second wireless communication system, wherein the first wireless communication system is a 5G/Next Generation System, 5G/NGS, system, and the second wireless communication system is a 4G/Evolved Packet System, 4G/EPS, system, wherein the 5G/NGS system is a source system and the 4G/EPS system is a target system during idle mode mobility, the apparatus comprising processing circuitry and memory collectively configured to perform operations comprising:
- obtaining (S1) a 5G/NGS security context, including at least one 5G/NGS security key, and
- mapping (S2) the 5G/NGS security context to a 4G/EPS security context, comprising
- deriving (S2-1) at least one 4G/EPS security key based on the 5G/NGS security key(s),
- wherein the 4G/EPS security context comprises the 4G/EPS security key(s).
Dependencies are inferred from the claim text.