scope:

Introduction

This standard specifies the physical layer for the 136+ bearer of the GPRS- 136 Packet Data Service. It specifies the slot structures and frame structures that are used. It specifies sub channeling on the uplink PDCH. This standard contains the specification of the paging displacement procedure for the PCCH of GPRS-136. It also specifies power output, power control, and modulation to be used for the 136+ bearer.

This physical layer is very similar to the physical layer for the DTC (see TIA/EIA-136-131 [3]). The frame structures and paging displacement procedure is very similar to the ones used on DCCH (see TIA/EIA-136-121 [2]).

To accomplish some tasks (e.g., tune to the correct carrier or use the correct power output), the physical layer must communicate with the Radio Resource Management Entity (RRME, see TIA/EIA-136-335 [6]). This communication is not specified using formal Service Access Points (SAPs) and service primitives. Instead it is an implementation-specific function and is shown as a connection without a SAP in the protocol reference diagrams in the GPRS-136 overview (see TIA/EIA-136-330 [4]).