An OFDM-Based System with Dynamic Packet Assignment and Interference Suppression for Advanced Cellular Internet Service

Future wireless networks are expected to employ packet access with highpeak-bandwidths demands. This will impose a significant challenge forfrequency reuse, especially for services deployed in a wide area. A dynamicpacket assignment (DPA) method [1] has been proposed as a key component of theMAC protocol for an OFDM-based Advanced Cellular Internet Service (ACIS)system [2], which is targeted for applications such as Web browsing, with apeak downlink transmission rate on the order of 1 Mb/s using a wide-areacellular infrastructure. This method is able to allocate radio resources ona packet time scale and reassign them in about 100 msec, thereby gainingadvantages in both statistical multiplexing of packet access and spectrumefficiency of dynamic channel assingment (DCA). In [1], it was shown thatclosed-loop SIR-based power control combined with DPA can achieve very highspectrum efficiency. However, the overhead required for power controliteration significantly reduces effective throughput. The contribution of thispaper is two-fold: (1) Interference suppression is considered as analternative for performance enhancement. (2) A detailed system description,for both downlink and uplink, is given to show how OFDM, DPA and interferencesuppression can be combined to support future high-speed wireless packet dataservices [3].

[1]  Jack H. Winters,et al.  Upper bounds on the bit error rate of optimum combining in wireless systems , 1994, Proceedings of IEEE Vehicular Technology Conference (VTC).

[2]  Walter Willinger,et al.  Self-similarity through high-variability: statistical analysis of Ethernet LAN traffic at the source level , 1997, TNET.

[3]  Theodore S. Rappaport,et al.  Wireless communications - principles and practice , 1996 .

[4]  Ramjee Prasad,et al.  An overview of air interface multiple access for IMT-2000/UMTS , 1998, IEEE Commun. Mag..

[5]  Leonard J. Cimini,et al.  Advanced cellular Internet service (ACIS) , 1998 .

[6]  Walter Willinger,et al.  Self-similarity and heavy tails: structural modeling of network traffic , 1998 .

[7]  James F. DeRose The Wireless Data Handbook , 1998 .

[8]  Walter Willinger,et al.  On the self-similar nature of Ethernet traffic , 1993, SIGCOMM '93.

[9]  Nelson Sollenberger,et al.  Spectrum resource allocation for wireless packet access with application to advanced cellular Internet service , 1998, IEEE J. Sel. Areas Commun..

[10]  J. H. Winters,et al.  Forward link smart antennas and power control for IS-136 , 1998, VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151).

[11]  Geoffrey Ye Li,et al.  Adaptive antenna arrays for OFDM systems with cochannel interference , 1999, IEEE Trans. Commun..

[12]  Leonard J. Cimini,et al.  Power control for dynamic packet assignment in advanced cellular Internet service , 1998, VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151).

[13]  Leonard J. Cimini,et al.  OFDM with diversity and coding for advanced cellular Internet services , 1997, GLOBECOM 97. IEEE Global Telecommunications Conference. Conference Record.