TH17326A - The method of random access in mobile radio systems. - Google Patents

Abstract

Methods for random access in periodic mobile radio systems, for example FDMA / TDMA systems, which include channels. Digital traffic signals and control channels Which will provide Four traffic lanes (TC) and two control channels (CC) are included in the TDMA frame. The mother station (BS) signals a symbol. Continuously (B / I, R / N, R / F) in the time (1,4) channel of the desired mobile station control channel, the system will respond Respond by sending the message of the first word (W1) in the time slot indicated. Performed by the mother station In the first symbol signal (B / I), when a mobile station (MS1) wants to send a message of multiple words (W2, W3), the parent station (BS) reserves a time slot. Or more to this purpose By sending the first symbol signal (B / I), where even though the current symbol Show that these times are busy. For other mobile stations (MS2, MS3). The mother station signals a symbol (R / N), which indicates whether the message has been received from the mobile station (MS1) or not. The parent station can signal the next symbol (R / F) indicating that the scheduled time slot has been reserved. Already For a mobile station assigned (MS3) from the beginning of Access process Therefore cannot be used by other mobile stations (MS1, MS2).

Claims (1)

1. A method used for random access in periodic mobile radio (TDMA) where control channels and channels Traffic signs A time slot within a specified frame and which includes one primary station. Is the least (BS) and a number of secondary stations (MS1, MS2, MS3), each station Send the access message in the form of a text of a word. (W1, W2 ......) which, however, during the time slots are distributed by the primary station (BS), the primary station sends a continuous first symbol (B / I) indicating the state that Time slots during Tsuktag: