Discussion on Heterogeneous Converged IoT Networking Scheme of

CBN in Hotel Field

Jiujun Bai, Yuqing Tong and Xuebo Chen

School of Electronic and Information Engineering, University of Science and Technology Liaoning, Qianshan Road,

Anshan, Liaoning, China

Keywords: 5G, The Internet of Things (IoT), China Broadcast Network (CBN), Heterogeneous Network,

Application Server IoT Gateway.

Abstract: The Internet of Things (IoT) is a business area that the four major domestic operators must compete in the 5G

era. How to build a hotel IoT solution based on China Broadcast Network (CBN) without affecting the

transmission of video information in the hotel industry is an urgent problem. Under the conditions of internal

transmission networks, integrating a networking solution into the CBN IoT is a key for this problem. This paper

proposes a heterogeneous networking scheme combining the common transmission medium conditions in the

hotel with the conventional network architecture of the IoT, CBN video transmission network and hotel

transmission network together. This should be a new idea for the hotel CBN IoT business.

1 INTRODUCTION

Driven by the country's policy of "Three-Network

Integration", CBN has become the fourth network

operator in China, and has subsequently carried the

heavy responsibility of 5G network and application

construction. As an important application in the field

of 5G, the IoT will cover all walks of life and penetrate

into all aspects of people's lives (Jaber M., Imran M.,

Tafazolli R., 2017). In the application of IoT, the

construction of the IoT basic network, utilization of

existing basic network and reducing the secondary

investment have become difficult problems, which are

also the focus of industry attention.

CBN network operator has accumulated a large

number of hotel users through years of accumulation,

and has a long-term accumulation in the video field

(

Jiujun Bai,

2018). In the 5G era, it has pre-emptive

resource advantages of the IoT in hotel field. At

present, most IoT services of CBN operator have a

system of "Cloud---Pipe---Terminals" architecture

through metro fiber network and the network near

users (

Jiujun Bai,

2018). The system and servers are

deployed in CNB operator's "cloud." A "pipe" connects

to the server, then the users enjoy the services through

"terminals" such as gateways, IoT hardware, mobile

phones, and set-top boxes (STB). Realization of hotel

https://orcid.org/0000-0001-6799-7667

room IoT based on CBN network mainly include cloud

service deployment, metro optical fiber network

connection, hotels integrated network construction,

guest room gateway and IoT hardware control (Imran

A., Zoha A., Abu-Dayya A.,2017).

The IoT business in hotels is difficult to

implement. The main problem is the complicated

condition of hotel head-end computer rooms, in-

building transmission networks, and guest room

terminals, from hotel construction ages, construction

standards, investment scale and other factors (

Shanlan,

Cheng., 2014

). After CBN operator's optical fiber

carrying the IoT service is connected to the hotel's

head-end computer room, the two-way interworking

networks required by the IoT information to reach

each room in the hotel are not all qualified, and the

network or coaxial cable laid by the hotel as the

medium is mainly carrying video services, and it is

difficult to add or re-lay cables through rewiring.

Therefore, the establishment of a network between a

cloud-compatible IoT server, a two-way interworking

network with the terminal gateway and the IoT

hardware, and the original transmission video

network in the hotel become the key to solving the

problem, which is under the premise of not increasing

the line construction between the hotel's head-end

computer room and the guest room. It can not only

Bai, J., Tong, Y. and Chen, X.

Discussion on Heterogeneous Converged IoT Networking Scheme of CBN in Hotel Field.

DOI: 10.5220/0009408303350340

In Proceedings of the 5th International Conference on Internet of Things, Big Data and Security (IoTBDS 2020), pages 335-340

ISBN: 978-989-758-426-8

335

integrate complex hotel internal network resources,

but also can solve the two-way service transmission

from the hotel room to the room at a low cost. The

establishment of a converged network can

comprehensively utilize the existing coaxial network

and wired or wireless IP network of the hotel. Under

different basic conditions, while ensuring different

business needs, the independent networks are merged

together to enhance the use of the hotel's existing

investment. And reduce redundant construction of

information and communication infrastructure.

2 ARCHITECTURE OF

DIFFERENT NETWOKS

2.1 Network Architecture of

Conventional IoT Applications

In the current technology form, the conventional IoT

architecture consists of three parts: the IoT cloud

application server, the IoT gateway, and the IoT

terminal device, which are connected through various

wired and wireless network methods in Figure 1.

Figure 1: Network architecture of conventional IoT

applications.

The IoT Cloud Application Server is generally on

a public or private cloud, which carries background

services for the IoT business. It is responsible for

certain IoT terminal device docking requirements that

require "cloud-cloud docking" in the cloud (L,

Wang., Y, Chen., et al. 2016). For example, after the

intelligent voice speaker receives an unrecognizable

voice control command locally, it needs to query the

command through the cloud server of the voice

library of the speaker manufacturer and return the

corresponding control command in the IoT

application server. The IoT gateway is connected to

the background application server, which is

responsible for the transmission of instructions and

data. Meanwhile it is connected to the IoT terminal

devices and interconnects with terminal devices such

as air conditioners, switch panels, and televisions in a

protocol-interconnected manner. Some complex IoT

gateways even play a role of edge servers (H, Zhang.,

C, Jiang., J, Cheng., et al .2015).

2.2 Network Architecture of CBN

Video Transmission

Based on the CBN network video transmission

network architecture, the video cloud of the

provincial CBN operator pushes the video source

from the provincial bureau to the head-end of each

city branch through the optical fiber, and then pushes

it to the regional head-end to the building optical

station. After photoelectric signal conversion and

video signal field strength adjustment, it can send to

the home or hotel room STB to achieve the purpose

of viewing in Figure 2.

Figure 2: Network architecture of CBN video transmission.

The traditional video transmission method based

on the CBN network has the characteristics of stable

video signals, clear images, and rich channels. It is the

main method of video transmission and used widely

in hotel field, extremely in upscale hotels.

2.3 Architecture of Traditional Hotel

Transmission Network

The network architecture in the hotel is very different

from that in the family. Generally, a head-end

computer room is set up at a designated location in the

hotel. Then external resources such as various types of

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video, broadband, and data are uniformly connected to

the computer room. At last the coaxial network,

category-5 line (Cat-5), and wireless networks transmit

data and resources to hotel rooms. (Figure 3).

Figure 3: Architecture of traditional hotel transmission

network.

At present, the common transmission networks in

hotels include coaxial, Cat-5 dual-line access, single

coaxial cable, and single Cat-5 to access guest rooms.

The transmission network wiring in hotels is mainly

done during the decoration period before. The hidden

lines in the wall are difficult to change later

(Linqiang, Xu., 2016). But because of video viewing

is a rigid demand for hotel guests, how to realize the

smooth data exchange between the room IoT gateway

and the connected IoT devices, the cloud IoT server

through the hotel's existing internal transmission

network while taking into account the transmission of

room video viewing services. That is the main

problem we want to solve.

3 HETEROGENEOUS FUSION

NETWORKING SCHEMES FOR

DIFFERENT TRANSMISSION

NETWORK SITUATIONS

Since the transmission of CBN networks is based on

ensuring the secure broadcast of video, general IoT

application servers will be deployed in the cloud

server of the provincial network operator, which will

be connected to the access network equipment of the

hotel room through optical fiber. It can connect the

other objects to the device's cloud server and set up

multiple levels of security in the cloud. (As shown in

Figure 4, Figure 5 and Figure 6.

3.1 Coaxial and Cat-5 Dual-line Access

Networking Scheme

The method of coaxial and Cat-5 cable dual-line

access to guest rooms is a commonly used for new

hotels in recent years. Coaxial cables are used for

video service transmission. Cat-5 cables were

originally used in the guest's room to access the

Internet. Now, most of the Internet access in guest

rooms are changed into wireless, such as access

through mobile phones or PAD and other equipment,

so Cat-5 can be used as a data transmission channel

for the IoT gateway in the room, connected to the

cloud server through the head-end GPON equipment

in the hotel room. (Figure 4).

Figure 4: Coaxial and Cat-5 cable dual-line access

networking scheme.

After the video cloud and IoT cloud of CBN are

connected to the hotel head-end computer room

through optical fiber, the video information flow is

converted into optical signals through the optical

station in the hotel. It transmitted to the guest rooms

through the coaxial network, and then connected to

the terminal STBs to play video programs. The IoT

application information flow is a photo electrically

converted through GPON equipment, and transmitted

to each guest room through Cat-5, also connected to

the guest room gateway, which is connected to the

guest room IoT device in a wired / wireless manner,

and the two services are running at the same time.

Discussion on Heterogeneous Converged IoT Networking Scheme of CBN in Hotel Field

337

3.2 Single Coaxial Network Access

Scheme

Some hotels built more than ten years ago has only a

small number of network applications in the early

ages of construction, so they only prelayed a single

coaxial line to access the rooms during wiring system

for guests watching video programs. There was no

two-way communication channel between the hotel

room and the guest’s room. Even if an IoT gateway is

placed in the room, it cannot connect to the computer

room and the IoT application server in the cloud,

which restricts the hotel's informatization and

intelligent development. (Figure 5).

Figure 5: Single Coaxial Network Access Scheme.

Due to the limitation of a single transmission

medium, we have added the EOC equipment head-

end in the hotel room and the EOC equipment

terminal in the room in order to realize the video

information flow and the IoT application information

flow in the hotel. In the axis network, the EOC

terminal is separated in the room, the room set-top

box and the IoT gateway are connected separately,

and the gateway is connected to the terminal IoT

device to realize the simultaneous operation of the

two services in the hotel room.

3.3 Single Cat-5 Line Access Network

Scheme

With the competition for customers in various

operators' industries, under the guidance of major

telecommunications operators and their business

agents, many new hotels are no longer distributed

coaxial cable among “head-end computer room,

hotel-floor room and the guest rooms”, an IP network

with only Cat-5, just one transmission medium,

intentionally blocks the way that CBN network

operators continue to provide services to hotel users

through the traditional STB deployment model.

Under this condition, we need to make full use of the

five types of lines that have been installed in hotel

rooms to integrate the IoT and video services. The

specific scheme is as follows in Figure 6.

Figure 6: Single Cat-5line access network scheme.

Since there are only Cat-5 as transmission media

from the computer room to the guest room, we will

first decode the video signal converted from the

optical station through the STB to decode the channel,

and cooperate with multiple video integrated editing

and adjusting machines to output one channel in

accordance with the way of one STB, turn it into an

IP signal and connect it to a Multicast push floor

switch with a multicast function to transmit the video

stream to each guest room to realize the video

transmission. At the same time, the GPON equipment

is connected to the IoT application information flow

in a manner of VLAN division, and is logically

isolated and connected to the hotel's push floor

switch. At last, send IoT information to the gateway

in guest rooms and connect the IoT terminal device.

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338

Because of the different IP addresses of the upstream

services of the two services in the hotel's internal

network, the same type of Cat-5 transmission medium

can still achieve the purpose of simultaneously

running the two types of services in hotel rooms(Jia,

Y, J., Chen, Q., A, Wang., et al. 2017).

4 COMPARISON OF THREE

CONVERGED NETWORKING

SOLUTIONS

In order to provide more suitable IoT networking

solutions for hotels with different internal network

profiles, we will put business separation methods,

input cost situations, and problems that may be

encountered during business operations into

comparative analysis.

From the comparison, we can see the different

solutions have their own advantages and

disadvantages. Based on comprehensive analysis, the

physically isolated networking method is more

suitable for hotel users to access and run TV and IoT

services at the same time in CBN network condition.

5 CONCLUSIONS

Table 1: Analysis of different problems encountered.

Number

Hotel internal

network transmission

media

Business

separation

Input costs

Problems that business may

encounter

Coaxial and Cat-5

dual-line access to

guest rooms

Physical

isolation

Low

Services are run separately in

different transmission networks

in the hotel without affecting

each other, but not all hotel

internal networks can meet the

requirements of media

conditions.

Single coaxial

network access to the

guest room

WDM High

The coaxial network may feed

noise signals and interfere with

the transmission quality of the

network. As a result, the

connection between the IoT

gateway and the cloud server

will fail, making the IoT devices

in the guest room unable to

respond to user instructions in

time

Single Cat-5 access to

guest rooms

Logical

isolation

Higher

After converted to IP streaming,

the video signal will occupy a lot

of transmission resources, which

will cause network congestion.

IoT gateway and IoT devices in

the guest room will delay to

respond to user instructions, and

affect the user’s experience.

China is entering the era of 5G application. The

widespread application of information, intelligence,

and networking of hotel field have driven people's

demand for hotel IoT applications (Peng, M., Li, Y.,

Zhao, Z., et al.2015). However, the problem, two-way

data communication, the IoT system and TV

transmission system can’t run simultaneously under

the existing transmission medium conditions, has

been restricting the development of the IoT business

in the hotel field. Under the long-term exploration,

testing, summarizing of the heterogeneous converged

networking solution of IoT of CBN in the hotel field,

no matter what kind of network situation the hotel

faces, it can use the hotel's existing transmission

network to connect the terminal device in hotel guest

rooms to the IoT application server. Also, the

solutions don’t affect the use of the existing video

transmission system. The implementation of this

solution can save a large amount of capital investment

for hotel operators and help them enter the IoT

operation camp at an early date.

ACKNOWLEDGEMENTS

This research reported herein was supported by the

NSFC of China under Grant No. 71571091 ，

71771112 and by University of Science and

Technology Liaoning Talent Project Grants No.

601011507-03.

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