Local ISDN radio transmission system
First Claim
1. A local ISDN transmission system comprising a central base station and a plurality of subscriber radio terminals, wherein the base station has a plurality of communication channels and is connectable to subscriber ports of one of a local switching center, a store-and-forward center and a private branch exchange to provide subscribers with access to a public ISDN telephone system through an S0 wireless transmission interface and is responsive to an activation request from a subscriber radio terminal for opening any available and free communication channel for a communication, wherein the plurality of subscriber terminals is greater than the plurality of communication channels and the S0 interface is an unrestricted interface and transmits a net bit rate of the subscriber terminal unrestricted through the communication channel, wherein an intermediate generator in the base station and in each subscriber terminal dividing an ISDN two-wire subscriber connection line between a line termination section and a network termination section communicating by radio transmission and wherein the intermediate generator upon the occurrence of an activation request by a subscriber terminal allocates a communication channel within waiting and monitoring periods for the activation of the ISDN two-wire subscriber connecting line and wherein a delay system delays the activation request by a delay period sufficient to switch the allocated communication channel and activate a radio system of the subscriber terminal.
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0 Petitions
Accused Products
Abstract
A local ISDN transmission system has a central base station and a number of subscriber radio terminals greater than the number of communication channels. The system is connectable to subscriber ports through an S0 wireless transmission interface and is responsive to an activation request from a subscriber radio terminal for opening any available and free communication channel for a communication. An intermediate generator in the base station and in each subscriber terminal divides an ISDN two-wire subscriber connection line between a line termination section and a network termination section communicating by radio transmission. The intermediate generator, upon the occurrence of an activation request by a subscriber terminal, allocates a communication channel within waiting and monitoring periods for the activation of the ISDN two-wire subscriber connecting line. A delay system delays the activation request by a delay period sufficient to switch the allocated communication channel and activate a radio system of the subscriber terminal.
63 Citations
13 Claims
- 1. A local ISDN transmission system comprising a central base station and a plurality of subscriber radio terminals, wherein the base station has a plurality of communication channels and is connectable to subscriber ports of one of a local switching center, a store-and-forward center and a private branch exchange to provide subscribers with access to a public ISDN telephone system through an S0 wireless transmission interface and is responsive to an activation request from a subscriber radio terminal for opening any available and free communication channel for a communication, wherein the plurality of subscriber terminals is greater than the plurality of communication channels and the S0 interface is an unrestricted interface and transmits a net bit rate of the subscriber terminal unrestricted through the communication channel, wherein an intermediate generator in the base station and in each subscriber terminal dividing an ISDN two-wire subscriber connection line between a line termination section and a network termination section communicating by radio transmission and wherein the intermediate generator upon the occurrence of an activation request by a subscriber terminal allocates a communication channel within waiting and monitoring periods for the activation of the ISDN two-wire subscriber connecting line and wherein a delay system delays the activation request by a delay period sufficient to switch the allocated communication channel and activate a radio system of the subscriber terminal.
Specification