This counter tracks the cumulative number of packet-data octets received by the headend on this Service ID, explicitly excluding the size of the wireless MAC header. Admins use it to measure upstream traffic volume for an individual subscriber's service, at the payload level rather than including protocol overhead. For example, an admin comparing a subscriber's actual application-level usage against their billed data allowance would rely on cwdIfHeServiceInOctets since it deliberately omits MAC header bytes.