METHOD AND TRANSCODER FOR PERFORMING A DISTRIBUTED HANDOVER IN THE UPLINK DIRECTION

    公开(公告)号:CA2267270A1

    公开(公告)日:1998-04-09

    申请号:CA2267270

    申请日:1997-09-26

    Abstract: The present invention relates to the technique of handover in mobile telephony. A new Transcoder and Rate Adaptation Unit (100, fig. 3) is introduced which provides two uplink (230, 250 respectively, fig. 3) and two downlink (240, 260 respectively, fig. 3) channels. The use of these two channels (230, 250 respectively, fig.3) on the uplink during handover provides for the use of distributed handover on the uplink. The result minimizes the audible interruption during handover by minimizing the loss of Traffic Channel frames to what is possible within the GSM standard. Additionally, interruption of the speech or background noise during these lost frames is masked by an error concealment algorithm, since the Transcoder and Rate Adaptation Unit (100, fig. 3) still has information from the Base Transceiver Station responsible for transmission before the handover.

    TRANSPORTING USER DATA OVER A-BIS AND A-INTERFACES WITHIN A MOBILE TELECOMMUNICATIONS NETWORK

    公开(公告)号:CA2270930C

    公开(公告)日:2006-11-28

    申请号:CA2270930

    申请日:1997-10-28

    Abstract: A synchronization frame is first formated and transmitted in accordance with the Global System for Mobile (GSM) 08.60 specification. After an initial synchronization procedure is accomplished between a transcoder/rate adaptor (TRAU) (40) and a particular base transceiver station (BTS) (50) serving a mobile station (60), a modified GSM 08.60 frame is thereafter used to transport greater user data payload across the established communications link. The modified frame replaces the synchronization bits included in the GSM 08.60 formatted data frame with user data to increase data payload from the conventional 13. 5 Kbit/s to a more desirable 14.4 Kbit/s without altering the standardized 16 Kbit/s transmission rate supported by the IWF and the BTS (50).

    Method and transcoder for performing a distributed handover in the uplink direction

    公开(公告)号:AU719645B2

    公开(公告)日:2000-05-11

    申请号:AU4478497

    申请日:1997-09-26

    Abstract: The present invention relates to the technique of handover in mobile telephony. A new Transcoder and Rate Adaptation Unit (100 FIG. 3) is introduced which provides two uplink (230, 250 respectively, FIG. 3) and two downlink (240, 260 respectively, FIG. 3) channels. The use of these two channels (230, 250 respectively, FIG. 3) on the uplink during handover provides for the use of distributed handover on the uplink. The result minimizes the audible interruption during handover by minimizing the loss of Traffic Channel frames to what is possible within the GSM standard. Additionally, interruption of the speech or background noise during these lost frames is masked by an error concealment algorithm, since the Transcoder and Rate Adaptation Unit (100 FIG. 3) still has information from the Base Transceiver Station responsible for transmission before the handover.

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