Communications system, bus and method for communication of ATM data traffic
AssigneeMarconi UK Intellectual Property Ltd.
InventorRichard J Proctor
Life of this patent
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Abstract
A communications system comprising device (e.g. an ATM physical layer (PHY)) and higher layer devices (e.g. an ATM layer and an AAL2 layer) are connected via a bus for communication of traffic therebetween, the bus comprising lines for carrying data and control signals. The bus supports data in ATM and AAL2 form and the devices discriminate between the two forms of data traffic. The data in AAL2 form typically comprises AAL2 mini-cells associated with identification of the source of destination of the mini-cells.
Claims35
A communications system, comprising:
- a common device;
- a plurality of higher layer devices;
- a bus for communicating data traffic comprising data in asynchronous transfer mode (ATM) form and data in adaptation layer type 2 (AAL2) form between the common device and the higher layer devices, the bus including lines for carrying data and control signals, the data in AAL2 form including an AAL2 mini-cell associated with a means of identification of at least one of a source and a destination of the mini-cell;
- and
- the devices including discrimination means for discriminating between the two forms of the data traffic.
A communications system, comprising:
- a common device;
- a plurality of higher layer devices;
- a bus for communicating data traffic comprising data in asynchronous transfer mode (ATM) form and data in adaptation layer type 2 (AAL2) form between the common device and the higher layer devices, the bus including lines for carrying data and control signals;
- and
- the devices including discrimination means for discriminating between the two forms of the data traffic, the discrimination means including means for using a field of the data traffic for discriminating between the two forms of the data traffic.
A method of communicating data traffic comprising data in asynchronous transfer mode (ATM) form and data in adaptation layer type 2 (AAL2) form via a bus between a common device and a plurality of higher layer devices, the bus including lines for carrying data and control signals, the method comprising the steps of:
- discriminating between the two forms of the data traffic;
- and the data in AAL2 form including an AAL2 mini-cell associated with a step of identification of at least one of a source and a destination of the mini-cell.
A method of communicating data traffic comprising data in asynchronous transfer mode (ATM) form and data in adaptation layer type 2 (AAL2) form via a bus between a common device and a plurality of higher layer devices, the bus including lines for carrying data and control signals, the method comprising the step of:
- discriminating between the two forms of the data traffic by using a field of the data traffic for discriminating between the two forms of the data traffic.
A method of communicating data traffic comprising data in asynchronous transfer mode (ATM) form and data in adaptation layer type 2 (AAL2) form via a bus between a plurality of common devices and a plurality of higher layer devices, the bus including lines for carrying data, control and address signals, the address signals being used for selecting one of the devices, the method comprising the step of:
- discriminating between the two forms of the data traffic.
Dependencies are inferred from the claim text.