es.tid.rsvp.constructs

Class WLANLabel

java.lang.Object

es.tid.rsvp.constructs.RSVPConstruct

es.tid.rsvp.constructs.WLANLabel

All Implemented Interfaces:

RSVPElement

public class WLANLabel
extends RSVPConstruct

DWDM Wavelength Label (RFC 6205). For the case of lambda switching of DWDM, the information carried in a wavelength label is: 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |Grid | C.S. | Identifier | n | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | m | Reserved | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ (1) Grid: 3 bits The value for Grid is set to 1 for the ITU-T DWDM grid as defined in [G.694.1]. +----------+---------+ | Grid | Value | +----------+---------+ | Reserved | 0 | +----------+---------+ |ITU-T DWDM| 1 | +----------+---------+ |ITU-T CWDM| 2 | +----------+---------+ |Future use| 3 - 7 | +----------+---------+ (2) C.S. (channel spacing): 4 bits DWDM channel spacing is defined as follows. +----------+---------+ |C.S. (GHz)| Value | +----------+---------+ | Reserved | 0 | +----------+---------+ | 100 | 1 | +----------+---------+ | 50 | 2 | +----------+---------+ | 25 | 3 | +----------+---------+ | 12.5 | 4 | +----------+---------+ | 6.25 | 5 | +----------+---------+ |Future use| 6 - 15 | +----------+---------+ (3) Identifier: 9 bits The Identifier field in lambda label format is used to distinguish different lasers (in one node) when they can transmit the same frequency lambda. The Identifier field is a per-node assigned and scoped value. This field MAY change on a per-hop basis. In all cases but one, a node MAY select any value, including zero (0), for this field. Once selected, the value MUST NOT change until the LSP is torn down, and the value MUST be used in all LSP-related messages, e.g., in Resv messages and label Record Route Object (RRO) subobjects. The sole special case occurs when this label format is used in a label Explicit Route Object (ERO) subobject. In this case, the special value of zero (0) means that the referenced node MAY assign any Identifier field value, including zero (0), when establishing the corresponding LSP. When a non-zero value is assigned to the Identifier field in a label ERO subobject, the referenced node MUST use the assigned value for the Identifier field in the corresponding LSP-related messages. (4) n: 16 bits n is a two's-complement integer to take either a positive, negative, or zero value. This value is used to compute the frequency as shown above.

Author:

jaume

Field Summary

Fields

Modifier and Type	Field and Description
static int	ITU_T_CWDM_GRID ITU-T CWDM Grid
static int	ITU_T_DWDM_GRID Encode a DWDM Wavelength Label
static int	ITU_T_FLEX ITU-T CWDM Grid

Fields inherited from class es.tid.rsvp.constructs.RSVPConstruct

bytes, length

Constructor Summary

Constructors

Constructor and Description
WLANLabel()

Method Summary

Modifier and Type	Method and Description
void	decode(byte[] bytes, int offset) Decode a DWDM Wavelength Label
void	encode() Generic method to encode an RSVP element
int	getChannelSpacing()
int	getGrid()
int	getIdentifier()
int	getM()
int	getN()
void	setChannelSpacing(int channelSpacing)
void	setGrid(int grid)
void	setIdentifier(int identifier)
void	setM(int m)
void	setN(int n)
String	toString()

Methods inherited from class es.tid.rsvp.constructs.RSVPConstruct

getBytes, getLength, setBytes, setLength

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

ITU_T_DWDM_GRID

public static final int ITU_T_DWDM_GRID

Encode a DWDM Wavelength Label

See Also:

Constant Field Values

ITU_T_CWDM_GRID

public static final int ITU_T_CWDM_GRID

ITU-T CWDM Grid

See Also:

Constant Field Values

ITU_T_FLEX

public static final int ITU_T_FLEX

ITU-T CWDM Grid

See Also:

Constant Field Values

Constructor Detail

WLANLabel

public WLANLabel()

Method Detail

encode

public void encode()
            throws RSVPProtocolViolationException

Description copied from interface: RSVPElement

Generic method to encode an RSVP element

Throws:

RSVPProtocolViolationException

decode

public void decode(byte[] bytes,
                   int offset)
            throws RSVPProtocolViolationException

Decode a DWDM Wavelength Label

Specified by:

decode in class RSVPConstruct

Throws:

RSVPProtocolViolationException

getGrid

public int getGrid()

setGrid

public void setGrid(int grid)

getChannelSpacing

public int getChannelSpacing()

setChannelSpacing

public void setChannelSpacing(int channelSpacing)

getIdentifier

public int getIdentifier()

setIdentifier

public void setIdentifier(int identifier)

getN

public int getN()

setN

public void setN(int n)

getM

public int getM()

setM

public void setM(int m)

toString

public String toString()

Overrides:

toString in class Object