Radwin 5000 HPMP, User Manual

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RADWIN 5000 HPMP User Manual Release 3.5.70 10 ‐ 5
Traffic Generation Tools
Traffic Generation Tools
For our examples in this chapter, we used the Iperf traffic generator with its GUI front end,
Jperf. These are free open source software packages found here:
Iperf: http://sourceforge.net/projects/iperf/
Jperf: http://sourceforge.net/projects/jperf/
Jperf includes the Iperf executable.
The results below are indicative rather than accurate. Accurate traffic generation and
measurement require hardware tools. See for example, http://www.ixiacom.com/ .
Traffic Generation Examples and method
Each case demonstrated below is based on a single HBS with three fixed HSUs. Two of them
will be idle and one will be heavily loaded (“the busy HSU”) to demonstrate the following
cases:
We will look at Example 1 in great detail, to ensure that you understand each item appearing
in the SBM Utilization window. Subsequent examples will be explained more briefly,
concentrating on utilization issues rather than graphic features.
Traffic generation was accomplished by using two parallel Jperf sessions. One sent traffic at
100 Mbps from the HBS to the HSU. The second sent traffic at 50 Mbps from the HSU to the
HBS. Both units were driven at maximum capacity.
Table 10 ‐ 1: Traffic generation examples ‐ Time slot (TS) Allocation
Example
Downlink TS
allocation
Uplink TS
allocation
Purpose
1
All HSUs 2 TS All HSUs 2 TS
Required downlink BW taken from unused
time slots
2
Busy HSU 2 TS,
others take all
remaining TS
All HSUs 2 TS
Required downlink BW taken from
allocated but unused time slots
3
All HSUs 2 TS
Busy HSU 1 TS,
others take all
remaining TS
Busy HSU “starved” in uplink direction
4
All HSUs 2 TS
Busy HSU 1 TS,
others take half
remaining TS
Busy HSU takes unallocated uplink time
slots