| 摘要 |
A media access control method is described for controlling access by one user station of a bus system to a first channel of the bus system utilized jointly by a plurality of user stations, where in the case of the method, at least one enable interval is specified for the user station, within which the user station has exclusive access to the first channel. In order to specify a media access control method in which large volumes of data may be transmitted relatively quickly and real-time conditions can be honored during the transmission of messages via the bus system, access to a second channel is utilized by a plurality of user stations is controlled using the method, the second channel being enabled for access by the user station only within the enable interval. |
| 主权项 |
1. A media access control method for controlling access by a first user station of a bus system to a first channel and a second channel of the bus system utilized jointly by a plurality of user stations, the method comprising:
determining, by first processing circuitry of the first user station and in accordance with a predefined protocol, whether an enable interval has commenced, wherein:
(I)
(a) the enable interval is predefined as a time window or a part of the time window within a regularly repeating time-window structure and the commencement of the enable interval is identified by the predefinition, or(b) the commencement of the enable interval is identified with the aid of bit-by-bit arbitration of the first channel; and(II) during the enable interval, only the first user station is enabled to transmit on the first and second channels;transmitting, by the first processing circuitry, an access control signal to second processing circuitry of the first user station during the enable interval to enable access to the second channel; while receiving the access control signal at the second processing circuitry, conditionally transmitting, by the second processing circuitry, first data on the second channel during the enable interval. |
