5th Generation of Wireless Communication

Transcription

1 Fraunhofer Heinrich Hertz Institute 5th Generation of Wireless Communication Panel Discussion ISWCS 2013, Ilmenau Dr.-Ing. Thomas Haustein, Fraunhofer HHI Fraunhofer Heinrich Hertz Institute, Einsteinufer 37, Berlin 1

2 Application Challenges Wireless Gigabit Connectivity E.g. 3D streaming ~100 Mbit/s, but download is expected 100 times faster: Wireless data kiosk (~ 10Gbit/s) content download Internet of Things: the next killer application Scalability problems (>100k nodes in a cell):

3 Application Challenges Fragmented Spectrum and the spectrum paradox: Spectrum scarce and expensive but underutilized White Spaces communication: 100x better localization, PAPR issues 100ms 10ms 1ms Tactile Internet (Real-time cyber-physical tactile control) Toughest constraint: human tactile sensing (distinguishes latencies in the order of 1ms) 1ms round-trip: time budget on PHY: max 100µs

4 Selected Reference Scenarios flexible fine-grained sharing of fragmented spectrum heterogeneous networks, vertical layering, frequency reuse > 1 super-high rate, low latency, increased signaling vast # M2M devices low rate, low complexity, low cost 4

5 Application Challenges: Wireless Access: flexible scalable content aware robust reliable efficient (energy, spectrum) Vision: Unified Frame Structure

6 4G Status and Pitfalls LTE tailored to maximize performance by enforcing strict synchronism and orthogonality. However, emerging trends reveal major pitfalls: MTC communications: bulky procedures to ensure strict synchronism Collaborative schemes: tremendous efforts to collect gains under the premise of strict synchronism and orthogonality Digital Agenda/Carrier aggregation: forces systems to deal with fragmented spectrum Localized Communication: communication sources and sinks might be in proximity direct comm or meshed comm w/o fixed infrastructure Special Application Requirements: reliability, latency, event triggering delay might be outside of standard cellular requirements Heterogeniouty: in Network Arcitectures, Deployments and Applications Wireless for Everything: Access, Backhaul, Fronthaul, Direct Comm

7 5G Wireless Eco-System Holistic Approach for Heterogeneous Wireless Infrastuctures, Systems and Applications MTC Enable asynchroneous MTC traffic with drastically reduced signalling PHY, MAC and Network Layer Design CoMP/ HetNet Provision of asynchronous CoMP/HetNet concepts Fragmented & new Spectrum parts Asynchroneous carrier aggregation & High Carrier Frequency Signal Processing Wireless Communication (Context, Content, Location aware - Autonomy vs. Controlled ) Spectrum Access Rules and Guidelines 7

8 Unfied Frame Vision for Lower Part of Spectrum (< 6 GHz) Classical bit pipe traffic (type I) with highend spectral efficiency exploits orthogonality and synchronicity, wherever it is possible, e.g. when serving cell-centre users. Vertical layering at common time-frequency resources generates a non-orthogonal signal format supporting interference limited transmissions more efficiently (heterogeneous cell structures and cell edge). For high-volume data applications in those cell areas (type II), a multi-cell, multiuser transceiver concept is required. Machine-Type Communication (MTC) is expected to be one dominant application of 5G systems. For this sporadic traffic type (type III), a contention based-access technique is attractive, saving overhead by dropping the strict synchronicity requirement. Sensor-type traffic (type IV), the open weightless standard [3] has shown that, from an energy-efficiency perspective, it is beneficial to stretch the transmissions in time by spreading

9 Backhaul link High Data Rate Communication in Higher Part of Spectrum (> 10 GHz) Use the mm-wave bands Access link Fronthaul link Backhaul link RRU: BBU: Remote radio unit Base band unit mm-wave link Core network Device to device links Establish an overlay network where and when high capacity / data rate is needed RRU Seamless integration into 3GPP standards Full indoor & outdoor mobility support Cost & energy reduction Device 2 Device Link BBU

10 Wide Band and Millimeter Wave Cellular Overlay Concepts

11 Thank you for your attention! Contact: Dr.-Ing. Thomas Haustein Fraunhofer Heinrich Hertz Institute Berlin, Germany