Point-to-multipoint data transmission
First Claim
1. A method for performing point-to-multipoint data transmission from a transmitting station to a plurality of receiving stations, the method comprising the steps of:
- transmitting data from the transmitting station to the plurality of receiving stations via a first communication channel;
performing a first channel switching in the transmitting station when decoding of the transmitted data fails at a receiving station of the plurality of receiving stations, from the first communication channel to a second communication channel; and
retransmitting the data via the second communication channel while the first communication channel remains in use for transmitting new data;
wherein multiple retransmissions automatically occur on a plurality of different predetermined channels until the data is successfully transmitted via one of the plurality of different predetermined channels, and wherein additional data is simultaneously transmitted on the first communication channel during the multiple retransmissions; and
wherein after the decoding of the transmitted data fails at the receiving station, the receiving station automatically establishes a connection for retransmission on a channel of the plurality of predetermined channels without causing notification messaging to occur between the receiving station and the transmitting station.
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Abstract
The initial transmission of data packets in a point-to-multipoint communication network may often be delayed when retransmissions of erroneously decoded data packets are required. According to an aspect of the present invention, point-to-multipoint data transmission and retransmission of erroneously decoded data from a transmitting station to a plurality of receiving stations is performed, where retransmitted data is sent via at least one communication channel, which is different from the one used for the initially transmitted data. Advantageously, due to this there may be no need for further communication between the transmitting station and the receiving stations. Furthermore, according to an aspect of the present invention, the initial transmission of data packets is not delayed by retransmissions.
35 Citations
14 Claims
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1. A method for performing point-to-multipoint data transmission from a transmitting station to a plurality of receiving stations, the method comprising the steps of:
- transmitting data from the transmitting station to the plurality of receiving stations via a first communication channel;
performing a first channel switching in the transmitting station when decoding of the transmitted data fails at a receiving station of the plurality of receiving stations, from the first communication channel to a second communication channel; and
retransmitting the data via the second communication channel while the first communication channel remains in use for transmitting new data;
wherein multiple retransmissions automatically occur on a plurality of different predetermined channels until the data is successfully transmitted via one of the plurality of different predetermined channels, and wherein additional data is simultaneously transmitted on the first communication channel during the multiple retransmissions; and
wherein after the decoding of the transmitted data fails at the receiving station, the receiving station automatically establishes a connection for retransmission on a channel of the plurality of predetermined channels without causing notification messaging to occur between the receiving station and the transmitting station. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- transmitting data from the transmitting station to the plurality of receiving stations via a first communication channel;
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12. A communication system for performing a point-to-multipoint data transmission from a transmitting station to a plurality of receiving stations, wherein the transmitting station is adapted to transmit data from the transmitting station to the plurality of receiving stations via a first communication channel;
- wherein the transmitting station is adapted to automatically perform a first channel switching from the first communication channel to a second communication channel when decoding of the transmitted data fails at a receiving station of the plurality of receiving stations;
wherein at least one of the plurality of receiving stations is adapted to perform a second channel switching from the first communication channel to the second communication channel;
wherein the transmitting station is adapted to retransmit the data via the second communication channel while the first communication channel remains in use for transmitting new data; and
wherein multiple retransmissions automatically occur on a plurality of different predetermined channels until the data is successfully transmitted via one of the plurality of different predetermined channels, and wherein additional data is simultaneously transmitted on the first communication channel during the multiple retransmissions; and
wherein after the decoding of the transmitted data fails at the receiving station, the receiving station automatically establishes a connection for retransmission on a channel of the plurality of predetermined channels without causing notification messaging to occur between the receiving station and the transmitting station.
- wherein the transmitting station is adapted to automatically perform a first channel switching from the first communication channel to a second communication channel when decoding of the transmitted data fails at a receiving station of the plurality of receiving stations;
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13. A transmitting station for a communication system for a performing point-to multipoint data transmission to a plurality of receiving stations, wherein the transmitting station is adapted to transmit data from the transmitting station to the plurality of receiving stations via a first communication channel;
- wherein the transmitting station is adapted to perform a channel switching from the first communication channel to a second communication channel when decoding of the transmitted data fails at a receiving station of the plurality of receiving stations;
wherein the transmitting station is adapted to retransmit the data via the second communication channel while the first communication channel remains in use for transmitting new data; and
wherein multiple retransmissions automatically occur on a plurality of different predetermined channels until the data is successfully transmitted via one of the plurality of different predetermined channels, and wherein additional data is simultaneously transmitted on the first communication channel during the multiple retransmissions; and
wherein after the decoding of the transmitted data fails at the receiving station, the receiving station automatically establishes a connection for retransmission on a channel of the plurality of predetermined channels without causing notification messaging to occur between the receiving station and the transmitting station.
- wherein the transmitting station is adapted to perform a channel switching from the first communication channel to a second communication channel when decoding of the transmitted data fails at a receiving station of the plurality of receiving stations;
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14. A receiving station suitable to use with a communication system for receiving a data packet transmitted from a transmitter to a plurality of receiving stations by means of a point-to multipoint data transmission, wherein the receiving station is adapted to receive the data transmitted via the first communication channel;
- wherein the receiving station is adapted to perform a channel switching from a first communication channel to a second communication channel when decoding of the transmitted data fails at a receiving station of the plurality of receiving stations;
wherein the receiving station is adapted to receive the retransmitted data via the second communication channel while the first communication channel remains in use for transmitting new data;
wherein multiple retransmissions automatically occur on a plurality of different predetermined channels until the data is successfully transmitted via one of the plurality of different predetermined channels, and wherein additional data is simultaneously transmitted on the first communication channel during the multiple retransmissions; and
wherein after the decoding of the transmitted data fails at the receiving station, the receiving station automatically establishes a connection for retransmission on a channel of the plurality of predetermined channels without causing notification messaging to occur between the receiving station and the transmitting station.
- wherein the receiving station is adapted to perform a channel switching from a first communication channel to a second communication channel when decoding of the transmitted data fails at a receiving station of the plurality of receiving stations;
Specification