To improve throughput rates of packets transmitting positive train control (PTC) messages in an asynchronous wireless network that supports controlling movement of trains, data rates are adjusted based one or more conditions of the link. Modulation and coding schemes with less overhead can be employed to increase the data rate at which information is transferred when an estimated link quality or conditions are relatively good. Conversely, when the estimated link quality is relatively poor, more robust modulation and coding schemes for transmissions can be used to maintain link performance but at the cost of reduced data rates. Optionally, if the estimated link quality is higher than required to achieve a predefined maximum transmit rate at a given default power rate, transmit power can be reduced to that necessary for transmit at the predefined maximum transmit rate.
ADAPTIVE CODING, MODULATION, AND POWER CONTROL FOR POSITIVE TRAIN CONTROL SYSTEMS
CODAGE ADAPTATIF, MODULATION ET CONTROLE DE PUISSANCE POUR DES SYSTEMES DE COMMANDE INTEGRALE DES TRAINS
2022-05-04
Patent
Elektronische Ressource
Englisch
ADAPTIVE CODING, MODULATION, AND POWER CONTROL FOR POSITIVE TRAIN CONTROL SYSTEMS
Europäisches Patentamt | 2022
|British Library Conference Proceedings | 2011
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