US Patent No. 9,253,634

KEY UPDATING METHOD, DEVICE AND SYSTEM


Patent No. 9,253,634
Issue Date February 02, 2016 
Title Key Updating Method, Device And System
Inventorship Yi Yang, Beijing (CN)
Assignee CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY, Beijing (CN)

Claim of US Patent No. 9,253,634

1. A method of updating a key, the method comprising:
a small base station monitoring user plane uplink Packet Data Convergence Protocol (PDCP) count value or user plane downlink
PDCP count value of each User Equipment (UE) connected with the small base station; and

the small base station transmitting a key update request as a function of the user plane uplink PDCP count value or the user
plane downlink PDCP count value to a macro base station so that the macro base station updates a key in response to the key
update request or the small base station transmitting information about the user plane uplink PDCP count value or the user
plane downlink PDCP count value to the macro base station so that the macro base station updates a key according to the information
about the user plane uplink PDCP count value or the user plane downlink PDCP count value.