Standalone link The SA link is defined such that it may serve as a wireless replacement of an Ethernet cable in any computer or telecommunication network. Besides the PHY, the only MAC layer issues to be defined are the automatic link setup and the feedback required for closed-loop link adaptation. No NC and AP functionality are required in SA mode. Multiuser link The MU link requires additional PHY and MAC functionalities, in particular support for synchronized MU transmission in the uplink. The feedback from MUs has to be transmitted in an orthogonal manner, i.e. without contention whenever possible. An additional control channel is needed, which is broadcast to all MUs so that each device is informed about the granted transmission interval in both link directions. Dynamic bandwidths sharing among MUs is supported in a controlled manner in both directions. Coordinated link In the CO link, all APs are operated in a time-synchronized manner. MUs and APs are enabled to estimate the physical interference channel both for the downstream and upstream directions. This information is conveyed to the NC via the APs and the fronthaul. The NC needs this information for interference coordination and handover. By additionally knowing interference conditions, transmission can be optimized, interference avoided and even exploited. General features Data rates This proposal supports variable data rates from 1 Mbit/s to 10 Gbit/s, depending on the use case. This is achieved in principle using OFDM modulation with a variable number of subcarriers, together with adaptive bit- and power loading using variable modulation formats on subcarriers or subcarrier groups, depending on the channel-, interference- and noise-characteristics of the wireless link. Efficiency use of optical bandwidth This proposal supports an efficient use of the optical bandwidth. This includes robustness against multi-path propagation in the OWC channel and is addressed by means of closed-loop adaptive transmission and the support of MIMO technology. Moreover, PHY and MAC layer are defined so that latencies below 1 ms are achievable for data rates of 100 Mbit/s and above. Advanced wireless networking Feedback and control channels are defined so that transmission is robust in all channel realizations. Moreover, control plane information is made easily available to higher layer protocols that enable advanced wireless networking in MU and CO modes. Short time intervals between feedback and control messages allow low latency and instantaneous adaptation to the time-varying wireless channel.
Standalone link The SA link is defined such that it may serve as a wireless replacement of an Ethernet cable in any computer or telecommunication network. Besides the PHY, the only MAC layer issues to be defined are the automatic link setup and the feedback required for closed-loop link adaptation. No NC and AP functionality are required in SA mode. Multiuser link The MU link requires additional PHY and MAC functionalities, in particular support for synchronized MU transmission in the uplink. The feedback from MUs has to be transmitted in an orthogonal manner, i.e. without contention whenever possible. An additional control channel is needed, which is broadcast to all MUs so that each device is informed about the granted transmission interval in both link directions. Dynamic bandwidths sharing among MUs is supported in a controlled manner in both directions. Coordinated link In the CO link, all APs are operated in a time-synchronized manner. MUs and APs are enabled to estimate the physical interference channel both for the downstream and upstream directions. This information is conveyed to the NC via the APs and the fronthaul. The NC needs this information for interference coordination and handover. By additionally knowing interference conditions, transmission can be optimized, interference avoided and even exploited. General features Data rates This proposal supports variable data rates from 1 Mbit/s to 10 Gbit/s, depending on the use case. This is achieved in principle using OFDM modulation with a variable number of subcarriers, together with adaptive bit- and power loading using variable modulation formats on subcarriers or subcarrier groups, depending on the channel-, interference- and noise-characteristics of the wireless link. Efficiency use of optical bandwidth This proposal supports an efficient use of the optical bandwidth. This includes robustness against multi-path propagation in the OWC channel and is addressed by means of closed-loop adaptive transmission and the support of MIMO technology. Moreover, PHY and MAC layer are defined so that latencies below 1 ms are achievable for data rates of 100 Mbit/s and above. Advanced wireless networking Feedback and control channels are defined so that transmission is robust in all channel realizations. Moreover, control plane information is made easily available to higher layer protocols that enable advanced wireless networking in MU and CO modes. Short time intervals between feedback and control messages allow low latency and instantaneous adaptation to the time-varying wireless channel.
15-16-0016-00-007a-proposal-for-tg7r1-high-rate-pd-communications.docx