Other

Huawei Technologies Canada Co., Ltd.

Zhuang, Weihua

Omar, Hassan Aboubakr

Bharati, Sailesh

Shen, Xuemin

Lu, Ning

Weihua Zhuang

Xuemin Shen

Xu Li

Hassan Omar

Jie Gao

Sailesh Bharati

Hassan Aboubakr Omar

Ning Lu

A method, apparatus and system for medium access control is provided. Time slots configured to include mini slots at the beginnings thereof. Devices are assigned time slot, mini slot combinations as transmission opportunities. A device can attempt to use a transmission opportunity when it has a packet to send, by beginning data transmission in its assigned slot and mini slot and potentially continuing the transmission up until the end of the assigned slot. If another device is already transmitting in the assigned slot, the device refrains from using its transmission opportunity. Higher priority devices can be assigned transmission opportunities corresponding to earlier mini slots within a slot. In some embodiments, multiple devices can be assigned the same transmission opportunity and a collision detection mechanism can be employed. In some embodiments, all devices detect if a slot is idle and advance the beginning of the next slot upon such detection.

Method, apparatus and system for medium access control

In vehicular communication networks, reliable delivery of safety messages is crucial and any transmission collision is to be avoided. A method based on time division multiple access scheme is described. An extra layer is provided to manage and schedule transmission of safety messages. The extra, message broadcasting handling layer (MBH layer) is provided between safety applications and medium access control (MAC) layer. Safety messages generated and received from safety application is spooled in the MBH layer and scheduled by the MBH layer for delivery to the MAC layer for broadcasting. A device to implement the method is also described.

Method of managing single-hop and multi-hop broadcast in vehicular communication networks and device therefor

In vehicular ad hoc networks (VANETs), vehicles communicate either with each other via vehicle-to-vehicle (V2V) communication or with stationary road side infrastructure or road side units (RSUs) via vehicle-to-infrastructure (V2I) communication, to exchange information generated by the mobile applications. Vehicular networks require a reliable and efficient one-hop broadcast service. A makeup strategy for vehicular networks, referred to as cooperative relay broadcasting (CRB), is described. Neighboring nodes rebroadcast the packet from a source node to increase the reliability of the broadcast service. The decision to perform CRB is taken proactively and based on the channel conditions between the relaying nodes and the target one-hop neighbors.

System and method of rebroadcasting messages for reliable vehicular communications

The invention generally relates to the field of vehicular communications. In particular, the invention relates to method, system and apparatus for establishing and maintaining vehicular communications, such as wireless vehicular communications in a vehicular ad hoc network (VANET).

Method, system and apparatus for enabling vehicular communications

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Waterloo, Canada

Weihua Zhuang