Method of Distributing Security Key Context, Mobility Management Entity, and Base Station

摘要

A method of distributing a security key context, where the method includes receiving, by a mobility management entity, a first indication from a primary base station, where the first indication is used for requesting a path switch from the mobility management entity and indicating that the path switch is triggered by carrier aggregation between base stations, processing the path switch according to the first indication, and keeping, according to the first indication, the security key context for the path switch unchanged, and sending a second indication to the primary base station, to indicate the primary base station to keep the security key context unchanged, or sending a third indication to the primary base station, to indicate the primary base station to acquire a quantity of times of reversal of a next hop chaining counter in the security key context.

主权项

1. A mobility management entity, comprising:
a receiver configured to receive a first indication from a primary base station, wherein the first indication is used for requesting a path switch from the mobility management entity and indicating that the path switch is triggered by carrier aggregation between base stations, and wherein the base stations comprise the primary base station; a processor coupled to the receiver and configured to process the path switch according to the first indication; and a transmitter coupled to the processor and configured to:
send a second indication to the primary base station according to the first indication, wherein the second indication is used for indicating the primary base station to keep a security key context for the path switch unchanged, and wherein the mobility management entity keeps the security key context unchanged according to the first indication; orsend a third indication to the primary base station according to the first indication such that the primary base station acquires a quantity of times of reversal of a next hop chaining counter in the security key context according to the third indication, wherein the quantity of times of reversal refers to the quantity of times that the next hop chaining counter jumps from a maximum value to a minimum value.