Introduction

GPRS-136 is the packet data service provided in TIA/EIA-136 (also known as UWC-136). A general description of the System Architecture and Protocol Descriptions is provided in TIA/EIA-136-330.

To provide very high data rates, GPRS-136 uses a 1.6 MHz bearer channel, also known as 136HS Indoor. The upper layers of the GPRS-136 protocol stack are common throughout UWC-136, applying to each individual bearer (136+, 136HS Outdoor, and 136HS Indoor). This document provides an Overview of the 136HS Indoor bearer channel, configured as a traffic channel (PTCH), for GPRS-136. An RLC/MAC entity for the 136HS Indoor bearer channel is specified in TIA/EIA-136-362 and a Physical Layer is specified in TIA/EIA-136-361.

Two implementation modes are defined. A Frequency Division Duplex (FDD) mode uses separate RF channels for the Mobile Station transmitter and the Base Station transmitter, thus allowing both to transmit simultaneously. In the Time Division Duplex (TDD) mode a single RF channel is used by both the Mobile Station transmitter and the Base Station Transmitter, which requires that the Mobile Station and Base Station transmit alternately, thus sharing the RF resource in time.