Patent ID: 8155024
Filing Date: 2012-04-10
Classification: H04L

Abstract:
1. A cable modem termination system (CMTS) for managing network connectivity of a customer premises equipment (CPE), the CMTS being connected to the CPE via a cable modem and connected to a dynamic host configuration protocol (DHCP) server via a network, the CMTS includes one or more functional code modules executed by at least one processor to perform the managing network connectivity, the at least one or more functional code modules comprising: a data packet checking module operable to receive a data packet from the network, determine whether the data packet is a request message from the CPE, and record related information of the request message if the data packet is a request message from the CPE, or handle the data packet normally if the data packet is not a request message from the CPE; a radio frequency (RF) channel monitoring module operable to monitor an RF channel between the cable modem and the CMTS, determine whether the RF channel has been changed to anther RF channel, and check whether the related information of the request message exists in the CMTS if the RF channel has been changed to anther RF channel; and a message informing module operable to generate and send a response message to the CPE according to the request message if the related information of the request message exists in the CMTS, request the DHCP server to allocate a new internet protocol (IP) address to the CPE, and control the CPE to communicate with the network according to the new IP address.