In December, it is 20 degree centigrade in day in Punjab. However, the lowest temperature can reach minus 3 degree centigrade. The diurnal temperature difference is extreme; because of the Eurasia monsoon climate, it is always frosting in the evening with high humility in air.
Because the rally is temporary and outdoor, the commission time is relatively short( up to two and half day). The signal coverage area is large with many languages to be interpreted; the devices endure the strong sunshine in day and low temperature at night. The simultaneous interpretation equipment used in the past could not meet the demand, so the headquarter and the Indian division has searched for the simultaneous interpretation equipment that meet the demand since April. With the technical comparison of equipments from suppliers all over the world( including UHF frequency band interpretation system, IR interpretation system, FS-FHSS interpretation system and others) and demonstration, they eventually selected FS-FHSS simultaneous interpretation system, the upgraded and innovated version of DSSS interpretation system. The writer will write down the design and operation process for your reference.
Customers’ requirements:
（1）In order to meet the demand of the rally in future( The rally is held in the last several day in December), the simultaneous interpretation devices should have 16 channels
（2） In order to facilitate the device control and device management, the male area and female area should be controlled by one system
（3）The female area applied interpretation receivers as the voice source and connect 5 channel to the distributed broadcast respectively;
（4）The devices must be damp-proof, cool-proof, anti-sunshine
（5）The system construction is simple, it is convenient to install and commission the devices( the period of installation and commissioning is short, in this mission, there are two and half day to install and debug, on the afternoon of 25th, the system is officially operating)
（6）Clear sound, stable system
（7）The system does not require wireless permission
（8）The system should meet the demand of the synchronous operation in both male area and female area, also meet the demand of separated operation .(Namely, integrated and separated function)
The requirements of this rally
（1）On the afternoon of 25th December, prayer ceremony: 1+9 channels interpretation in male area
（2）On the morning of 26th , 27th, 29th, December: 1+9 channels interpretation in male/female area, the original source is the chairman speech in male area;
（3）On the afternoon of 26th , 1+9 channels interpretation in male area, 1+5 channels in female area, independent operation;
（4）At 3:30 pm in 28th December, Live video from London, 1+8 channels interpretation in both male and female area.
Devices Selection:
According to the customer’s demand and the outdoor application condition, because GONSIN IR simultaneous interpretation system was applied in the military parade in the Independent Day of Georgia, we offered two solutions( GONSIN IR simultaneous interpretation system and GONSIN Simultaneous Interpretation System) and demonstrated them respectively.
According to the customer’s demand, the demonstration is as follow:
The male area 100m×75m, female area 80m×60m, outdoor application: FS-FHSS simultaneous interpretation transmission can reach from 50m to 500m without any interference from sunshine or obstacles. According to the 16 channels and the operation condition of both areas, with FS-FHSS equipped with 4 wireless access points to transmit 8 languages, FS-FHSS simultaneous interpretation should equip with 4 wireless access points( two for male area, two for female area). IR simultaneous interpretation is easily interfered by sunshine, and high density of 25,000 participants could interfere the IR signal. If it applied IR interpretation system, it should dramatically increase the IR radiators.However, the increase of IR radiators could increase the construction difficulty of this rally( in this rally, there is not enough rigging for the installation of IR radiators), even it installed the IR radiators, it is a huge challenge to adjust the angles of radiators and delay; if they are tripod mounting, in this crowded rally, it is extremely risky to trip people. If those problems could be solved, numerous radiators could increase the investment.
Demonstration results:
FS-FHSS simultaneous interpretation system: ★★★★★
IR simultaneous interpretation system: ★
FS-FHSS solution is better than IR solution.
Customers’ first requirement: 1+15 channels.
For this requirement, GONSIN digital IR system and FS-FHSS system could satisfy the demand. However, for the third requirement: on the afternoon of 26th in December: Male area 1+9 channel, female area 1+5 channels, independent operation,; the second requirement, 1+9 channels used together. By the integration or separation of the system, FS-FHSS system can meet the demand; on 26th, by the grouping function of the FS-FHSS system , it sets from channel 1 to channel 10 as a group to meet the demand of male area, sets channel 11 to channel 16 as another group to meet the demand of female area. Although IR system and FS-FHSS system have integration and separation function, however, FS-FHSS is easier to be installed.
Demonstration result:
FS-FHSS interpretation system: ★★★★★
IR interpretation system : ★★★
Customer’s second requirement: to facilitate the devices control and management, the male area and female area should be covered by one system. The distance between two areas is 200 meters. Given that the real wiring is not straight, the length of it is up to 360 meters. The long-distance transmission has two solutions: one is fiber optic, another is signal relay. It is easy for both systems to set the control unit in the chairman area.
Demonstration result:
FS-FHSS interpretation system: ★★★★★
IR interpretation system : ★★★★★
The fifth requirement from the customers: The system configuration is simple, the installation and commission of devices is convenient. According to the first demonstration line of Device Selection, we can reach a conclusion that the components of FS-FHSS system are just 2 server, 6 wireless points and the corresponding interpretation receivers( there are 1,000 seats with interpretation receiver in this rally, in the future, the system would be extended), charging case. Compared with the IR system, the system configuration and the installation and commissioning of FS-FHSS is more simple. In fact, except the consideration of installation and commissioning of devices, the supplier should consider the disposition before sales. The number of wireless access point could be counted by the simple estimation of the on-site environment. However, whether the IR radiators reflect enough, whether the sunshine interferes, these should be considered fully. What is more, the installation place of IR radiators and their angle also need to be considered.
Demonstration result:
FS-FHSS interpretation system: ★★★★★
IR interpretation system : ★
The forth requirement of the customers: Devices must be damp-proof, cool-proof, anti-sunshine. Both systems are damp-proof, cool-proof. However, as for anti-sunshine, IR system would faces bigger challenge in the strong sunshine. But before the operation, this requirement is fully considered, the user experience of it could not be affected.
Demonstration result:
FS-FHSS interpretation system: ★★★★★
IR interpretation system : ★★★★
Both systems could meet the demand of the third, sixth, seventh requirement of the customer.
Demonstration result:
FS-FHSS interpretation system: ★★★★★
IR interpretation system :★★★★★
Solution:
According to the comprehensive consideration and full demonstration, we finally recommend GONSIN FS-FHSS interpretation system, the detailed solution is as follow:
1. System Components: FS-FHSS conference server: 3 units( one unit to realize 8 channels, two for 16 channels, another is backup and operates jointly and separately)
Four wireless access points: 4 ( two for male area, two for female area)
Receiver: 1,000
Interpretation Unit: 15 units
Charging case: several
2. System Configuration:
（1）In order to meet the demand of joint operation and separate operation for male area and female area. So that, it put two conference servers in the control room in the male area to facilitate the devices control and management;
（2） Based on the separate operation on the afternoon of 26th, 1+9 channels for male area, 1+5 channels for female area. In addition, the ground voice is from the chairman area in female area. Given that the interpreters acquire the body language of speaker through the window, so it placed several interpreter booths in the female area.
（3） In order to cover the signal evenly, two wireless access points are installed in the male are and two for the female area. The installation angle is dipping downward.
The male area: 75m*100m
The female area: 60m*80m
The cable from the control room in male area to WAP: 100m
The cable from the control room in female area to WAP: 80m
Between WAP: 10m
All cables: 360m
3. System configuration
(1) the afternoon of 25th , the morning of 26th, 27th and 28th application is solution one.
(2) the afternoon of 26th application is solution two.
Solution One
Solution Four
Real result:
（1）Customers could hold conferences with 1+15 interpretation channels, and combine and separate within 16 channels at their will( it would be 1+9 channels for male area, 1+5 channels for female are; it could meet the demand of three areas, four area and even more);
（2）Except the outdoor application in this conference, it could meet the demand of multiple indoor conferences. When the interpreter booths is insufficient, it could assign the remote interpreter booth to use. The installation and debugging is simple, convenient, efficient;
（3）The extensibility of the system: within the signal coverage, customer could add more receiver in according to the guests, and do not need to add more equipment.
Customers’ feedback:
1. The direct customer: Perfect
2. The organization staff: Simple, convenient, easy to operate and use
3. The end-user: naturalized language as mother tone, easy to understand
4. The superior of the customer: the interpretation system is the biggest highlight in this event.
Project sidelights:
1. Local weather, temperature
2. Project scene
3. Equipments
Server
Wireless Access Points
Charging cases
