| 摘要 |
A first telecommunications system (201), with radio transmission access utilizing code division multiple access (CDMA) with a time division multiple access (TDMA) component, has at least partially geographically overlapping coverage with a second telecommunications system (202), base station (BS) of the first system communicates over an air interface with a subscriber statio n (SS) and broadcasts a common broadcast physical channel (BPCH) including broadcast system identity information on at least an active carrier/timeslot combination (C/TS). The subscriber station uses the broadcast system identit y information to distinguish between transmissions of the two telecommunicatio ns systems, and for framing transmissions in the first system. The base station of the first system broadcasts at least two common broadcast physical channe ls active on different timeslots. Preferably, a fixed direct sequence CDMA code is employed for the common broadcast physical channel. In accordance with an instant dynamic channel selection procedure of the present invention, the subscriber station selects a carrier/timeslot for sending an access request to the first system base station. The carrier/timeslot selected is also used fo r a traffic channel and is preferably a least interfered carrier/timeslot. In response to the access request, the first system base station sends an answe r on a next down-link carrier/timeslot included in a duplex pair with the selected carrier/timeslot. At any given moment a connection between the firs t system base station and the subscriber station is borne on a physical channe l of the first telecommunications system, the physical channel being defined b y a code, timeslot, and frequency.
|
