Abstract: Embodiments of this application disclose a data processing method for avoiding a packet loss and for improving user experience. The method in the embodiments includes: sending, by a cable modem termination system CMTS, a dynamic bonding change (DBC) request to a cable modem (CM), where the DBC request is used to request the CM to change a modulation profile group corresponding to the downstream channel from a first profile group to a second profile group. The first profile group is a profile group currently supported by the CM, and at least one target profile in the second profile group is not in the first profile group. The method further includes sending, by the CMTS, a first downstream data packet to the CM by using any profile in the first profile group, and sending a second downstream data packet to the CM by using the target profile.

Abstract: An upstream bandwidth allocation method, apparatus, and system. The method includes obtaining, by a cable modem termination system (CMTS), a service flow attribute of each online cable modem (CM) of one or more online CMs, where the service flow attribute comprises at least one delay-sensitive service and a delay-insensitive service, allocating, by the CMTS, an upstream bandwidth to each online CM according to a received service request, and obtaining a remaining bandwidth that is a remaining part in a preset total bandwidth other than the upstream bandwidth that is allocated to each online CM according to the service request, allocating, by the CMTS, at least a part of the remaining bandwidth to a CM whose service flow attribute is a delay-sensitive service, and informing, by the CMTS, each online CM of the one or more online CMs of an upstream bandwidth allocation result.

Abstract: An upstream bandwidth allocation method, apparatus, and system. The method includes obtaining, by a cable modem termination system (CMTS), a service flow attribute of each online cable modem (CM) of one or more online CMs, where the service flow attribute comprises at least one delay-sensitive service and a delay-insensitive service, allocating, by the CMTS, an upstream bandwidth to each online CM according to a received service request, and obtaining a remaining bandwidth that is a remaining part in a preset total bandwidth other than the upstream bandwidth that is allocated to each online CM according to the service request, allocating, by the CMTS, at least a part of the remaining bandwidth to a CM whose service flow attribute is a delay-sensitive service, and informing, by the CMTS, each online CM of the one or more online CMs of an upstream bandwidth allocation result.