Auto encapsulation detection
OwnerMathieu Mercierinventor
Life of this patent
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Abstract
ABSTRACT The invention relates to the configuration of Network Access Devices (NAD's) and more specifically, to the detection of the type of protocol encapsulation used on an xDSL line for an ATM VC. The steps occurring in the encapsulation autodetection scheme are as follows. First, the protocol settings are configured for the channel. Then, a packet is created according to the protocol and sent. Any replies received within a timeout delay are recorded. If some replies are received in time, then the autodetection for the particular protocol setting is successful and the autodetection scheme can either abort or continue with another protocol setting, if wanted. If no replies are received in time, the autodetection scheme is started over with other protocol settings.
Claims18
In configuring a Customer Premises Equipment (CPE) Network Access Device (NAD) to use an encapsulation protocol for traffic between the NAD and the remote Network Access Concentrator (NAC) over an ATM link, a method for determining an ATM encapsulation type and a connection type comprising:
- assembling a first message to solicit a first response according to a first encapsulation protocol;
- sending said first message over the ATM link to said network access concentrator from said network access device;
- receiving and recording a first response to said first message at said network access device;
- analyzing said first response to determine said encapsulation type and connection type to correspond to said first encapsulation protocol using said first message.
In configuring a Customer Premises Equipment (CPE) Network Access Device (NAD) to use an encapsulation protocol for traffic between the NAD and the remote Network Access Concentrator (NAC) over an ATM link, a method for determining an ATM encapsulation type and a connection type comprising:
- assembling a plurality of messages to respectively solicit a plurality of responses according to a plurality of respective encapsulation protocols having a common connection type;
- sending said plurality of messages over the ATM link to said network access concentrator from said network access device;
- receiving and recording at least one response to said plurality of messages at said network access device;
- analyzing said at least one response to determine said encapsulation type and connection type to correspond to at least one of said respective encapsulation protocols.
A system for configuring a Customer Premises Equipment (CPE) Network Access Device (NAD) to use an encapsulation protocol comprising an ATM encapsulation type and a connection type for traffic between the NAD and the remote Network Access Concentrator (NAC) over an ATM link, the system comprising:
- a protocol configurator for setting the NAD to use a first encapsulation protocol;
- a packet generator for assembling a first message to solicit a first response according to said first encapsulation protocol, sending said first message over the ATM link to said network access concentrator from said network access device and receiving and recording a first response to said first message at said network access device;
- said protocol configurator analyzing said first response to determine said encapsulation type and connection type to correspond to said first encapsulation protocol using said first message.
Dependencies are inferred from the claim text.