TDMA - CDMA White Papers
Changes on CDMA-Based BW Request Procedures in OFDMA-PHY for Mobile Environment
Overview In IEEE P802.16-REVd/D1-2003 OFDMA-PHY, CDMA-based periodic ranging and bandwidth-request transmissions are transmitted in the same uplink allocations for UIUC = 11. Bandwidth-request transmissions are for requesting uplink allocations from the BS, and periodic ranging transmissions are sent for periodic adjustment for the system reflecting the channel conditions (timing and power adjustments). The two ranging codes (BW-request and periodic ranging) are discriminated only by the code usage groups dynamically allocated and notified via UCD messages by the BS. This paper contains suggestions to the improvement of the CDMA-based bandwidth request procedures in OFDMA-PHY.
| Publisher | Institute of Electrical and Electronics Engineers | File Format | PDF, requires Acrobat Rdr 5 |
|---|---|---|---|
| Date Published | October 2003 | Downloads | 45 |
| Format | White Papers | ||
| Topics | |||
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