Please note that in this file
* the network is represented as a directed graph.
* this network is an explicit decomposed network after graph decomposition.
* each node in the network has an ID number.
* ignore all isolated nodes (i.e. those without any link coming in and going out). The isolated nodes are previous merging nodes. They are decomposed after graph decomposition.    
* each number below represents a certain node in the network.
* each link is represented by a node pair (X,Y), where the direction is from node X to node Y.
* each link is associated three bandwidth attributes: the occupied bandwidth (B_occu), the maximum bandwidth (B_max = 100 Mbps), and the bandwidth for supporting NCM (B_s_T = 40 Mbps)

The following shows the multicast scenario:

Network size:
49

Source:
1

Receivers: 
46, 47, 48, 49

Expected Data Rate:
2

Links and their attributes:

     X     Y    B_occu

     1     2    50
     1     3    12
     2     4    28
     3     5     4
     4     6    35
     5     6    18
     4     7    45
     5     7    39
     6     8    17
     7     9     4
     8    10    10
     9    11    22
    10    12     1
    11    12    42
    10    13    30
    11    13    31
     2    14    24
    12    15    40
    13    16    21
     3    17    47
    14    18    44
    15    18    49
    14    19     8
    15    19     4
    16    20     7
    17    20    35
    16    21     4
    17    21    21
    18    22    35
    19    23    10
    20    24     6
    21    25    12
    22    26     1
    23    27    48
    24    28     5
    25    29    20
    26    30    31
    27    30    18
    26    31    24
    27    31    38
    28    32    16
    29    32    47
    28    33     5
    29    33     2
    30    34    14
    31    35     5
    32    36    29
    33    37    42
    34    38    50
    35    39    33
    36    40    25
    37    41    47
    38    42    32
    39    42    13
    38    43    36
    39    43    34
    40    44     7
    41    44     4
    40    45    14
    41    45    44
    22    46     4
    42    46    35
    23    47    38
    43    47    48
    24    48    14
    44    48     5
    25    49    32
    45    49    19
	