A frame structure that is ordinarily optimized for providing variable high data rates also includes the flexibility to efficiently carry lower data rate, lower latency frames using sub-framing. Superframes, each comprised of a predetermined number of frames, carry voice and data communications at one...http://www.google.de/patents/US6907020?utm_source=gb-gplus-sharePatent US6907020 - Frame structures supporting voice or streaming communications with high speed data communications in wireless access networks
