Wireless communication system comprising a physical channel for overall random access in time and space

    公开(公告)号:US11405882B2

    公开(公告)日:2022-08-02

    申请号:US16603147

    申请日:2018-03-30

    申请人: SIGFOX

    IPC分类号: H04W4/70 H04W64/00 H04W74/08

    摘要: A wireless communication system including a cellular access network connected to a cellular network core, the cellular access network including cellular base stations adapted to exchange data with terminals on physical channels, called coordinated access channels, each cellular base station serving a geographical area, all the geographical areas served by the cellular base stations forming a geographical region. The wireless communication system includes random access base stations serving the geographical region, each random access base station being adapted to receive data emitted by terminals on a permanent physical channel, called random access channel, the permanent physical random access channels of the random access base stations using the same radio resources throughout the geographical region.

    Planning an instant for transmitting a message over a broadcasting channel

    公开(公告)号:US11974210B2

    公开(公告)日:2024-04-30

    申请号:US17598153

    申请日:2020-04-16

    申请人: SIGFOX

    IPC分类号: H04W48/10

    CPC分类号: H04W48/10

    摘要: A method for transmitting a broadcasting message by an access network intended for a group of terminals. The terminals are configured to recurrently and asynchronously transmit polling messages intended for the access network. An instant for transmitting the broadcasting message is determined on the basis of information relating to the recurrence of the polling messages transmitted by the terminals of the group. Before transmitting the broadcasting message and for each polling message received from a terminal of the group, a response message including one or more parameters relating to the transmission of the broadcasting message is transmitted. The response message needs to be received by the terminal during a listening window with a predetermined duration following the transmission of the polling message. The broadcasting message is transmitted over the broadcasting channel at the determined transmission instant.

    Method for transmitting a message over a broadcast channel with retransmission over a point-to-point link

    公开(公告)号:US11855779B2

    公开(公告)日:2023-12-26

    申请号:US17601059

    申请日:2020-04-16

    申请人: SIGFOX

    IPC分类号: H04L1/08 H04H20/16

    CPC分类号: H04L1/08 H04H20/16

    摘要: A method for transmitting a message via an access network to a group of terminals is provided. The access network transmits the message to the group of terminals over a broadcast channel. The access network receives a request for retransmission of the message transmitted from a terminal that has not correctly received the message. The access network evaluates a predetermined broadcast retransmission criterion and retransmits the message over a point-to-point link or over a broadcast channel according to the predetermined broadcast retransmission criterion.