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    • 117. 发明申请
    • LOCAL ISDN RADIO TRANSMISSION SYSTEM
    • 本地无线传输系统ISDN
    • WO1995005053A1
    • 1995-02-16
    • PCT/DE1994000878
    • 1994-07-28
    • SCHIFFEL, ReinhardJÄCKEL, KlausSTADLER, BrunoVOGEL, Holger
    • H04Q07/24
    • H04W88/08H04Q11/0457H04Q2213/098H04Q2213/099H04Q2213/1302H04Q2213/1304H04Q2213/13082H04Q2213/13094H04Q2213/13098H04Q2213/13106H04Q2213/13202H04Q2213/13204H04Q2213/13209H04Q2213/13213H04Q2213/13298H04Q2213/13299H04Q2213/13322H04Q2213/383H04W84/14
    • A local ISDN radio transmission system is organised as a local radio cell that consists of a central stationary radio station and of a plurality of decentralised subscriber radio sets. The radio transmission system is connected to the access connection elements (ISDN base access ports) of a local central office, subcentre or private branch exchange. The number of radio subscribers is larger than the number of used duplex radio channels. The invention ensures to the radio subscribers a connection with a SO-interface. The radio transmission in the subscriber area allows covering range limitations to be lifted, which otherwise result from attenuation and propagation time problems encountered in the case of wire transmission. According to the invention, the radio transmission arrangement is inserted into a ISDN two-wire access connection circuit with an intermediate repeater, in the section that extends between the intermediate repeater and the network termination. After an activation request, a radio channel is allocated within the carency and monitoring times for activating the ISDN two-wire access connection circuit. In order to ensure an efficient use of the available transmission bandwidth, an independent radio channel for control, organisation and monitoring purposes is dispensed with. The required instructions and information are transmitted in the free radio channels. The subscriber radio sets recognize free channels thanks to a special arrangement of the synchronisation word that differs from that of the ISDN transmission.
    • 本发明涉及一种本地无线电ISDN传输系统,它是作为由中央无线基站的本地无线电小区和多个组织分散订户无线电。 无线电传输系统被连接到本地交换机,部分交换或专用小交换机的用户端口(ISDN基本接入)。 无线设备的数目大于占用双工无线电信道的数量较大。 本发明确保了无线用户的用户终端到S0接口。 通过在用户区域中的无线电传输被固定,在该范围的限制被取消,导致有线传输通过阻尼和运行时问题。 根据本发明,所述无线传输装置被插入到与所述腿中继网络终端中继器的ISDN双线用户线。 激活请求后,无线电信道的分配的育儿假和监视时间内为ISDN双线用户线的激活来执行。 有关可用传输带宽的有效利用是不需要用于控制,组织和控制目的的独立无线电信道。 必要的指令和信息在免费广播频道发送。 参与者通过无线电从所述同步字的ISDN传输布置的特殊偏差识别空闲信道。