Rate adaptation in a non-uniform non-transparent data channel
First Claim
1. Rate adaptation equipment in a telecommunication system for data transmission employing a frame-structured end-to-end data transmission protocol between telecommunication equipment of a transmitting party and telecommunication equipment of a receiving party over a non-uniform non-transparent traffic channel or set of traffic channels consisting of a traffic channel section of a higher capacity and a traffic channel section of a lower capacity, the rate adaptation equipment being located at an interface between the higher capacity and the lower capacity traffic channel sections and comprising:
- a data buffer that buffers frames received from the higher capacity traffic channel section before the frames are transmitted to the lower capacity traffic channel section; and
data buffer control arranged to adjust a filling level of the data buffer by intervening on the frame-structured end-to-end transmission protocol and activating, based on the filling level of the data buffer, data flow control according to said data transmission protocol over said traffic channel section of higher capacity in the telecommunication equipment of the transmitting party, said data buffer control being arranged to pass the end-to-end protocol through the rate adaptation equipment without intervention otherwise, wherein;
the data buffer control is arranged to convert acknowledgement frames of a second frame type, transmitted by the receiving party, into acknowledgement frames of a first frame type before forwarding the acknowledgement frames to the transmitting party when the data flow control is activated.
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Accused Products
Abstract
Rate adaptation method and equipment in a telecommunication system for data transmission employ a frame-structured data transmission protocol between the telecommunication equipment of the transmitting party and the telecommunication equipment of the receiving party via a non-uniform non-transparent traffic channel or set of traffic channels consisting of a traffic channel section of a higher capacity and a traffic channel section of a lower capacity. The interface between the high capacity and the low capacity traffic channel section is provided with rate adaptation equipment that consists of a data buffer and data buffer control. The data buffer buffers the frames received from the high capacity traffic channel section before they are transmitted to the low capacity traffic channel section. The data buffer control adjusts the filling level of the data buffer by activating, if necessary, data flow control according to the data transmission protocol in the telecommunication equipment of the transmitting party.
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Citations
10 Claims
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1. Rate adaptation equipment in a telecommunication system for data transmission employing a frame-structured end-to-end data transmission protocol between telecommunication equipment of a transmitting party and telecommunication equipment of a receiving party over a non-uniform non-transparent traffic channel or set of traffic channels consisting of a traffic channel section of a higher capacity and a traffic channel section of a lower capacity, the rate adaptation equipment being located at an interface between the higher capacity and the lower capacity traffic channel sections and comprising:
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a data buffer that buffers frames received from the higher capacity traffic channel section before the frames are transmitted to the lower capacity traffic channel section; and data buffer control arranged to adjust a filling level of the data buffer by intervening on the frame-structured end-to-end transmission protocol and activating, based on the filling level of the data buffer, data flow control according to said data transmission protocol over said traffic channel section of higher capacity in the telecommunication equipment of the transmitting party, said data buffer control being arranged to pass the end-to-end protocol through the rate adaptation equipment without intervention otherwise, wherein; the data buffer control is arranged to convert acknowledgement frames of a second frame type, transmitted by the receiving party, into acknowledgement frames of a first frame type before forwarding the acknowledgement frames to the transmitting party when the data flow control is activated. - View Dependent Claims (2, 3, 4, 5, 6)
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7. Rate adaptation equipment in a telecommunication system for data transmission employing a frame-structured end-to-end data transmission protocol between telecommunication equipment of a transmitting party and telecommunication equipment of a receiving party over a non-uniform non-transparent traffic channel or set of traffic channels consisting of a traffic channel section of a higher capacity and a traffic channel section of a lower capacity, the frame-structured data transmission protocol comprising a data flow control that is activated in the telecommunication equipment of the transmitting party in response to a frame of a first frame type transmitted by the receiving telecommunication equipment, and it is terminated in response to receiving a frame of a second frame type, the rate adaptation equipment being located at an interface between the higher capacity and the lower capacity traffic channel sections and comprising:
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a data buffer that buffers frames received from the higher capacity traffic channel section before they are transmitted to the lower capacity traffic channel section; a data buffer control being arranged to monitor the filling level of the data buffer and acknowledgment frames that the receiving party transmits to the transmitting party, the data buffer control being arranged to intervene on said data transmission protocol between the telecommunication equipment and to activate said local data flow control in the telecommunication equipment of the transmitting party by transmitting a frame of a first frame type when the filling level of the data buffer increases to a first threshold value, the data buffer control being arranged to convert acknowledgement frames of a second frame type, transmitted by the receiving party, into acknowledgement frames of the first frame type before they are forwarded to the transmitting party when said local flow control is active, and the data buffer control being arranged to eliminate said activation of data flow control by transmitting a frame of the second frame type when the filling level of the data buffer decreases to a second threshold value. - View Dependent Claims (8, 9)
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10. A rate adaptation method for data transmission employing a frame-structured end-to-end data transmission protocol between telecommunication equipment of a transmitting party and telecommunication equipment of a receiving party via a non-uniform non-transparent traffic channel or set of traffic channels consisting of a traffic channel section of a higher capacity and a traffic channel section of a lower capacity, said rate adaptation method comprising:
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buffering, in a data buffer, frames received from the higher capacity traffic channel section before they are transmitted to the lower capacity traffic channel section, monitoring a filling level of the data buffer, intervening on the end-to-end data transmission protocol between the telecommunication equipment and activating data flow control according to the data transmission protocol towards the traffic channel section of higher capacity in the direction of the transmitting party when the filling level of the data buffer increases to a first threshold value, sending frames from the data buffer over the traffic channel section of lower capacity to the receiving party, while the data flow control towards the traffic channel section of higher capacity is activated, deactivating the data flow control according to the data transmission protocol towards the traffic channel section of higher capacity in the direction of the transmitting party when the filling level of the data buffer decreases to a second threshold value and the activation of the data flow control is not requested by the receiving party, and converting acknowledgement frames of a second frame type, transmitted by the receiving party, into acknowledgement frames of a first frame type before forwarding the acknowledgement frames to the transmitting party when the data flow control is activated.
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Specification