Commit 0f6d9e9d authored by Ashkan Taslimi's avatar Ashkan Taslimi

Update systemParameters

Add Full search method
Add ric method
parent 2ced4aea
Pipeline #3750 failed with stages
in 2 seconds
from abc import ABC, abstractmethod
import prrt
import math
import ric
class AbstractSearch(ABC):
@abstractmethod
def search(self):
pass
class HECFullSearch(AbstractSearch):
def __init__(self, n_p_max, prrtApplicationParameters, prrtChannelParameters, prrtSystemParameters):
self.n_max = 255
self.n_p_max = n_p_max
self.prrtApplicationParameters = prrtApplicationParameters
self.prrtChannelParameters = prrtChannelParameters
self.prrtSystemParameters = prrtSystemParameters
self.p_t = self.prrtApplicationParameters.max_residual_loss_rate
pass
def search(self):
ri_min = math.inf
k_opt = 0
n_c_opt = 0
n_p_opt = []
# Eq.5.9, page 125
fec_delay_min = self.prrtSystemParameters.source_packet_interval + \
self.n_p_max * self.prrtSystemParameters.redundancy_packet_transmission_delay + \
(self.prrtChannelParameters.rtt_prop_fwd + self.prrtSystemParameters.processing_delay) / 2 + \
self.prrtSystemParameters.packet_loss_detection_delay
# Eq.5.9 page 125 assumung D_sup = 0
req_delay = self.prrtChannelParameters.rtt_prop_fwd + \
self.n_p_max * self.prrtSystemParameters.redundancy_packet_transmission_delay + \
self.prrtSystemParameters.processing_delay
# Eq.5.10, page 125
n_c_max = math.ceil((self.prrtApplicationParameters.max_latency - fec_delay_min) / req_delay)
# self.k_lim = somewhat(prrtApplicationParameters.loss_tolerance, self.n_max)
for n_c in range(n_c_max + 1):
# Eq.5.11, k(Nc, D_T), page 125
k_max = min(self.get_k(n_c, req_delay), self.get_k_lim(1, self.n_max))
for k in range(1, k_max + 1):
n_p = ric.get_ric(self.n_max - k, n_c, 1, self.n_p_max)
for i in n_p:
coding_conf = prrt.PrrtCodingConfiguration(self.n_max, k, i)
ri = coding_conf.get_redundant_information(self.prrtChannelParameters)
if ri < ri_min:
k_opt = k
n_c_opt = n_c
n_p_opt = i
return prrt.PrrtCodingConfiguration(k_opt, n_c_opt, n_p_opt)
def get_k(self, n_c, req_delay):
math.ceil((self.prrtApplicationParameters.max_latency -
self.n_p_max * self.prrtSystemParameters.redundancy_packet_transmission_delay -
(self.prrtChannelParameters.rtt_prop_fwd + self.prrtSystemParameters.processing_delay) / 2 -
self.prrtSystemParameters.packet_loss_detection_delay -
n_c * req_delay) / self.prrtSystemParameters.source_packet_interval)
def get_k_lim(self, start, end):
mid_point = math.ceil((end - start) / 2)
p_r = self.get_max_coding_block_length(mid_point)
if (p_r == self.p_t):
return mid_point
elif (p_r > self.p_t):
self.get_k_lim(start, mid_point - 1)
else:
self.get_k_lim(mid_point + 1, end)
# Pr(k, n_max)
def get_max_coding_block_length(self, k):
total_packet_erasure = 0
for i in range(1, k):
for j in range(max(self.n_max - k + 1, i), self.n_max - k + i):
packet_erasure_at_i = i * self.hypergeometric_distribution(self.n_max, k, i, j) * self.get_error_prob(
j, self.n_max, self.prrtChannelParameters.loss_rate_fwd)
total_packet_erasure += packet_erasure_at_i
return (1 / k) * total_packet_erasure
# Restricted Integer combinations
"""
def partitionfunc(n, k, smallest=1):
'''n is the integer to partition, k is the length of partitions, smallest is the min partition element size'''
if k < 1:
raise StopIteration
if k == 1:
if n >= smallest:
yield (n,)
raise StopIteration
for i in range(smallest, n + 1):
for result in partitionfunc(n - i, k - 1, i):
yield (i,) + result
generator = partitionfunc(3, 1, )
for i in generator:
print(i)
"""
\ No newline at end of file
......@@ -175,26 +175,31 @@ class PrrtSystemParameters:
block_coding_delay,
redundancy_packet_transmission_delay,
processing_delay,
packet_loss_detection_delay):
packet_loss_detection_delay,
source_packet_interval):
self.block_coding_delay = block_coding_delay
self.redundancy_packet_transmission_delay = redundancy_packet_transmission_delay
self.processing_delay = processing_delay
self.packet_loss_detection_delay = packet_loss_detection_delay
self.source_packet_interval = source_packet_interval
def __repr__(self):
return "PrrtSystemParameters(block_coding_delay={}," \
"redundancy_packet_transmission_delay={}," \
"processing_delay={}," \
"packet_loss_detection_delay={})".format(self.block_coding_delay,
self.redundancy_packet_transmission_delay,
self.processing_delay,
self.packet_loss_detection_delay)
"packet_loss_detection_delay={}," \
"source_packet_interval={})".format(self.block_coding_delay,
self.redundancy_packet_transmission_delay,
self.processing_delay,
self.packet_loss_detection_delay,
self.source_packet_interval)
def __str__(self):
return "({},{},{},{})".format(self.block_coding_delay,
self.redundancy_packet_transmission_delay,
self.processing_delay,
self.packet_loss_detection_delay)
return "({},{},{},{},{})".format(self.block_coding_delay,
self.redundancy_packet_transmission_delay,
self.processing_delay,
self.packet_loss_detection_delay,
self.source_packet_interval)
class PrrtCodingConfiguration:
def __init__(self, n, k, n_p=None):
......@@ -240,6 +245,19 @@ class PrrtCodingConfiguration:
ri = 1 / self.k * self.n_p[0] + 1 / self.k * np.dot(error_prob_up_to_every_cycle, self.n_p[1:])
return ri
def get_ri_min(self, prrtChannelParameters):
p_e = prrtChannelParameters.loss_rate_fwd
return p_e / (1 - p_e)
def get_ri_residual(self, prrtChannelParameters, prrtApplicationParameters):
p_e = prrtChannelParameters.loss_rate_fwd
p_res = prrtApplicationParameters.max_residual_loss_rate
if (p_e >= p_res):
return (p_e - p_res) / (1 - p_e)
else:
return 0
# TODO
# Check if it is able to fulfill application parameters given channel parameters.
def hypergeometric_distribution(self, n, k, i, j):
......@@ -299,24 +317,30 @@ cdef class PrrtSocket:
return PrrtSystemParameters(cprrt.PrrtSocket_get_block_coding_delay,
cprrt.PrrtSocket_get_redundancy_packet_transmission_delay,
cprrt.PrrtSocket_get_processing_delay, # processing_delay
cprrt.PrrtSocket_get_loss_detection_delay) # packet_loss_detection_delay
cprrt.PrrtSocket_get_loss_detection_delay, # packet_loss_detection_delay
cprrt.PrrtSocket_get_source_packet_interval)
property block_coding_delay:
def __get__(self):
return 0
property redundancy_packet_transmission_delay:
def __get__(self, data):
return len(data) / cprrt.PrrtSocket_get_btlbw_fwd(self._c_socket)
def __get__(self):
# len(data) / cprrt.PrrtSocket_get_btlbw_fwd(self._c_socket)
return 0
property processing_delay:
def __get__(self):
return 0
property packet_loss_detection_delay:
def __get__(self)
def __get__(self):
return 0
property source_packet_interval:
def __get__(self):
return 0.01 # in seconds
# property data_rate_btl_fwd:
# def __get__(self):
# return cprrt.PrrtSocket_get_btlbw_fwd(self._c_socket)
......
import pyximport; pyximport.install()
import itertools
def gen_ric(redundancy, positions, min, max):
cdef c_redundancy = redundancy
cdef c_positions = positions
cdef c_min = min
cdef c_max = max
if c_positions < 1:
raise StopIteration
if c_positions == 1:
if c_redundancy >= c_min and c_redundancy <= c_max:
yield (c_redundancy,)
raise StopIteration
for i in range(c_min, c_redundancy + 1):
for result in gen_ric(c_redundancy - i, c_positions - 1, i, c_max):
if (i <= c_max):
yield (i,) + result
def get_ric(redundancy, positions, min, max):
rawList = []
permuted = []
f = gen_ric(redundancy, positions, min, max)
for i in f:
rawList.append(i)
for i in rawList:
permuted.append(itertools.permutations(i))
return permuted
\ No newline at end of file
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