Patent ID: 8205082
Filing Date: 2012-06-19
Classification: G06F,H04L

Abstract:
1. A domain upgrade method for a terminal, comprising: receiving, by a terminal which has a first rights object (RO) and a first domain key, a join domain response message including a domain ID field and a second domain key, wherein the domain ID field includes a ‘domain baseID’ for indicating an ID of a first domain among a plurality of domains managed by an entity, and wherein the join domain response message further includes a domain generation indicating a generation of the first domain; comparing the domain baseID of the domain ID field included in the join domain response message with a domain baseID of a domain ID stored in the terminal; if the domain baseID of the domain ID field included in the join domain response message is not consistent with the domain baseID stored in the terminal, performing a first procedure for joining the first domain; and if the domain baseID of the domain ID field included in the join domain response message is consistent with the domain baseID stored in the terminal, performing a second procedure for upgrading the first domain, wherein the second procedure includes: wherein the first domain key is associated with the domain generation stored in the terminal and is maintained to allow the first rights object to be still used after upgrading the first domain, and wherein the received second domain key is associated with the domain generation included in the join domain response message and allows a second rights object to be used.