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AIR INTERFACE FOR FIXED BROADBAND WIRELESS ACCESS SYSTEMS

IEEE Std 802.16-2001

BS MAC

BS PHY

 

SS PHY

SS MAC

 

 

PHY_TXSTART.request

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PHY_RXSTART.request

 

 

 

 

 

 

 

 

 

BS Tx and SS Rx period similar

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PHY_TXSTART.confirmation

 

 

 

 

to previous figure

 

 

 

 

 

 

PHY_RXSTART.confirmation

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

UL-MAP Message

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PHY_TXSTART.indication

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PHY_RXEND.indication

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PHY_TXSTART.request

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PHY_TXSTART.confirmation

 

 

 

 

 

PHY_RXSTART.request

 

 

 

 

 

Rx Period

 

Tx Period

 

 

 

 

PHY_MACPDU.request

 

 

 

 

 

 

 

 

 

 

Started

 

Started

 

 

 

 

 

 

 

 

 

 

 

PHY_RXSTART.confirmation

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

First

 

First

 

 

 

 

 

 

 

 

 

 

 

PHY_RXSTART.indication

 

 

 

 

 

 

MACPDU

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MACPDU

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Transmitted

 

 

 

 

 

 

PHY_TXSTART.indication

 

 

 

 

 

 

 

 

 

 

 

Received

 

 

 

 

 

 

 

 

 

 

 

PHY_MACPDU.indication

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PHY_MACPDU.confirmation

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PHY_MACPDU.indication

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PHY_MACPDU.request

 

 

 

 

PHY_RXEND.indication...

 

 

 

 

 

 

Uplink Burst

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PHY_MACPDU.confirmation

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

...

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PHY_TXEND.indication

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 106—Example of usage of primitives during uplink PHY PDU transfer

8.2 PHY for 10–66 GHz

8.2.1 Overview

This PHY specification, targeted for operation in the 10–66 GHz frequency band, is designed with a high degree of flexibility in order to allow service providers the ability to optimize system deployments with respect to cell planning, cost, radio capabilities, services, and capacity.

In order to allow for flexible spectrum usage, both time division duplex (TDD) and frequency division duplex (FDD) configurations (8.2.4) are supported. Both cases use a burst transmission format whose framing mechanism (8.2.5.1) supports adaptive burst profiling in which transmission parameters, including the modulation and coding schemes, may be adjusted individually to each subscriber station (SS) on a frame-by-frame basis. The FDD case supports full-duplex SSs as well as half-duplex SSs, which do not transmit and receive simultaneously.

The uplink PHY is based on a combination of time division multiple access (TDMA) and demand assigned multiple access (DAMA). In particular, the uplink channel is divided into a number of time slots. The number of slots assigned for various uses (registration, contention, guard, or user traffic) is controlled by the MAC layer in the BS and may vary over time for optimal performance. The downlink channel is time division multiplexed (TDM), with the information for each subscriber station multiplexed onto a single stream of data and received by all subscriber stations within the same sector. To support half-duplex FDD subscriber stations, provision is also made for a TDMA portion of the downlink.

Copyright © 2002 IEEE. All rights reserved.

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