Embed Size (px)
Citation preview
Communicating under pressure
22 March 2016
1/06/2016 Slide 1
Overview• Facts & figures
• General situation of the ASTRID services
– Situation of the radio network at Zaventem airport
/ in Brussels
– Relief measures: MTU
– Capacity management
• The context of the use of the radio network
– History
– A few considerations
– Media
– Parliamentary Inquiry Committee
• Proposed action plan
– Immediate action
– Short – Medium – Long Term
Facts & figures
22 March 2016
• 3 bomb attacks
• 2 at Brussels Airport (Zaventem)
• 1 in a Brussels metro station
(Maalbeek)
• Some 300 people wounded
• 35 people die in the attacks,
including the 3 suicide bombers
General situation
ASTRID services
● No technical failure of any ASTRID system, but…
● Radio
● Coverage OK
● High level of queueing – 09.00-12.00
● Paging
● 100% available
● Control rooms (CIC-HC100 VBR – CIC BXL)
● Inbound emergency calls 100 and 101 from mobile networks: issues
● Delay in PTT (CIC BXL, CIC VBR) - Queueing (cfr. radio network)
General situation of the ASTRID services
● Blue Light Mobile
● Congestion from 09h00 to 17h00
● The level of congestion in the commercial networks (Proximus,
Mobistar, Base) was so high that even accessing the network was
not possible at some time.
● Prioirty on bandwith only is not sufficient to fulfill BLM user’s
expectations.
● Having priority on access to the network (access class barring) and
preemption on traffic (eMLPP and ARP) would have been
mandatory.
General situation of the ASTRID services
Zaventem
● Outdoor: 4 to 8 times more traffic
than in a normal situation
● Indoor : 10 times more radio
traffic than in a normal situation.
Very little queueing has been
found.
Situation of the radio network
Indoor (intérieur des bâtiments et des
parkings)
Site Plaats # TTRX
VB101 Main terminal 4
VB103 Terminal A 4
VB102 Parking luchthaven 2
Outdoor (Extérieur des bâtiments)
Site Plaats # TTRX
BR014 Evere 4
VB012 Vilvoorde 3
VB020 Wezembeek-Oppem 4
VB037 Kampenhout 3
VB101 Main terminal 4
Situation of the radio network
Brussels (Maalbeek)
● BR007 and BR013: degree of queueing so
high as to be noticeable to the users – one in
three calls is delayed
● BR010: congestion from 09h00 until 12h00
● Intense queueing (100%): half of the calls
was delayed.
● Congestion of the communication channel
+ Congestion of the control channel
● A high proportion of interrupted calls
(50%)
● Congestion, interference, hand-overs,
priority management & pre-emptions
Indoor (intérieur du métro)
Site Plaats # TTRX
BR101 Art-Loi 2
Outdoor (Extérieur des bâtiments)
Site Plaats # TTRX
BR007 Schaarbeek 5
BR013 Etterbeek 4
BR010FOD binnenlandse
zaken5
● More than 4,300 active radio users in Brussels, instead of
the 2,500 seen on a typical day;
● Up to 600 active talk groups (each group has 34 users on
average) instead of the 200 seen on a typical day;
● 34,400 group communications
● 26,000 successful group communications;
● 8,400 unsuccessful or interrupted group communications; and
● 1,000 individual communications.
● A lot of scanning in Brussels and outside Brussels
Situation of the radio network
● To relieve the control channel of the BR010 site.
● To relieve a part of the radio traffic of the BR010 site.
● To create a uniform capture zone in the vicinity of the metro station in order to limit radio terminal hand-overs.
Brussels (Maalbeek) – Relief measures –
Deploying the MTU
● Prompt decision of ASTRID (09h40)
● Two hours of time lost● Co-ordination and chain of command
● Waiting for a police escort
● Fast deployment: 1h15–On Air @14.15
● Operational models● Factors determining capacity
● The resources that are deployed: number of users
● The typical call duration (group calls, individual calls)
● The type of communication (individual call, group calls)
● The expected service level (peak hour)
● The use of the priorities between users, between talk groups,
● An efficient use of radio systems (Air Connected vs Line Connected).
● Etc.
● Symbiosis of technical management and operational model● Fleetmapping
● Priorities & Pre-emptions
● Radio discipline
Capacity management
The context of the use
of the radio network
• History• A few considerations• Media• Parliamentary Inquiry Committee
Context of radio network use - History
35153
78195504
18916
15381
Attentats Buizingen 21-juil G7 Obama
# Group calls
578
75
168
425
343
Attentats Buizingen 21-juil G7 Obama
# Groups
4305
283
938
2881 2900
Attentats Buizingen 21-juil G7 Obama
# Radios
● A truly exceptional situation :
● 2 or more incidents almost simultaneously (attacks at Zaventem, in
metro station + other police activities going on)
● Communications concentrated in several very limited areas
● Profound change of the operational model
● Unprecedented deployment of resources
● Considerable reinforcements from several provinces sent to Brussels
● Application of radio discipline
● Total loss of commercial networks for mobile telephony (data was not
too impacted)
● Capacity prediction model no longer suitable
A few considerations
Media
On the day of the attacks, some of ASTRID’s radio assets in Brussels became saturated due to:
● The emergency’s exceptional nature – severe attacks were carried out successively at different locations in the space of a few hours and within a limited radius.
● Emergency and security services came in from across the country to assist with the incidents and this required additional network capacity in Brussels.
● Commercial mobile phone networks became saturated,leading to an increased number of individual calls on the ASTRID network; calls which, under normal circumstances, would have taken place over the mobile phone network.
Parliamentary commission in Brussels
18 May 2016
Source: TETRA TODAY / 18-05-2016
Action plan
• Plan for immediate action Optimizing network use by emphasys on more training to the end-users
• Short – Medium - Long Term Structural reinforcement of the
TETRA radio network’s capacity
Implement special priority on access (Access
Class Baring) and preemption on traffic resources (eMLPP&ARP) for Blue Light Mobile users on commercial network
Action plan Short – Medium – Long Term
Technical management: structural reinforcement of the radio network’s capacity Timing
1 Obtaining extra frequencies (400 MHz band) from the MoD ST
2 Increase the capacity of the network in Brussels ST
3 Setting up a Secondary Control Channel MT
4 Increasing BLM priority for ASTRID* MT
5Acquiring a tool for real time capacity monitoring: situation awareness & activating
reserve capacityST
Operational management: Review, together with the User Advisory Committee, of
the planned operational modelsTiming
6Review of the strategy concerning the priorities and pre-emptions of calls between ‘blue
light’ servicesST
7 Review of the fleetmappings (multi-service groups) and usage policy MT
8 Improve the training in the use of the radio network and in radio discipline ST
