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Zhang DongchenChina Mobile Communication Corporation, China
March 2011
Consideration on the future development of mobile service
2
Contents
The Network Development of China Mobile
Considerations on Spectrum Insufficiency of IMT
3
The development of mobile service in China
In the past decade, mobile communications have been growing rapidly in China, which makes a strong impact on our daily lives
By the end of 2010, the total number of national telephone users has reached 1153.39 million.
The number of mobile telephone users has reached 859 million The number of 3G users has reached 47.05 million The mobile tele-density in China is: 64.4 telephones /100 people
The growth rate of mobile phone in every month The growth rate of mobile phone in every month The proportion of mobile telephone usersThe proportion of mobile telephone users
Fixed telephone users Mobile telephone users
4
GSM and TD-SCDMA network
As the largest telecom operators in the world, China Mobile has played a very important role in the development of mobile service in China
The world's largest GSM network
More than 500,000 GSM Base Stations
More than 580 million users
Continued expansion in TD-SCDMA network coverage
Covering 656 cities with 135,000 base stations in operation at the end of 2010
Steady growth of 3G users:
22.636 million at the end of Jan 2011
5
The development of TD-LTE network
TD-LTE is China Mobile’s future Successful TD-LTE demonstration during Shanghai World Expo
演艺中心
世博轴
中国馆
世博中心
主题馆
Coverage: 5.28 square km Data rate: 70Mbps Outdoor BS: 17 Indoor coverage system: 8 Operating band: 2.3GHz
Users are enjoying various high quality mobile broadband services Users are enjoying various high quality mobile broadband services
Successful TD-LTE demonstration during Guangzhou Asian Games
Provide service such as high definition broadcast, mobile video monitoring, 3D games and high-speed Internet access etc
6
The development of TD-LTE network
Beijing
Field Trial:4 Vendors
Field Trial:5 Vendors
Lab Test:9 Vendors
Trials are ongoing in China
Nanjing
Shanghai
Hangzhou
Xiamen
Shenzhen
Beijing
Guangzhou
Lab Test: all system testes have been finished by Jan. 2010Lab Test: all system testes have been finished by Jan. 2010
Field Test: finished by the end of 2010Field Test: finished by the end of 2010Results show networking capability starts to be supportedResults show networking capability starts to be supported
Large-scale pre-commercial trial will be carried out in 6 cities this year.
Will deploy more than 3600 base-stations by the end of this year
Operating band: 2.6GHz&2.3GHz
7
Service provided by multiple networks
The traditional voice service is mainly carried by GSM network, and will grows steadily in the future
value-added data service will mainly carried by TD-SCDMA and future TD-LTE network
The income of data service has increased very rapidly due to the application of smart terminal and increase in mobile network bandwidth
8
Service provided by multiple networks
Data traffic becomes driving force for the growth of value-added business revenueData traffic becomes driving force for the growth of value-added business revenue
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The problem of spectrum insufficiency
Traffic trends of mobile communication
•Constructing and operating multiple networks at the same time will further aggravate spectrum insufficiency
•Constructing and operating multiple networks at the same time will further aggravate spectrum insufficiency
As the traffic capacity of mobile communications, especially the data traffic, increased rapidly, the spectrum of IMT is increasingly insufficient
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Solution to the spectrum insufficiency
Technical Method
Improve network capacity by narrowing the distance between BSs
the distance between some base stations in urban is less than 200 meters
Maximum the network potential by automatic frequency optimization
It has been widely adopted in China mobile’s network
Further improvement of current network is limitedFurther improvement of current network is limited
Method 1: Network optimization
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Solution to the spectrum insufficiency
ITU-R will finish the arrangement of IMT spectrum allocated at WRC07 in 2011 This is a very effective method which can obtain obvious effect in a short period
ITU region 2
ITU region 3
ITU region 1
450450 470470 790790 960960 17101710 20252025 21102110 22002200 23002300 24002400 25002500 26902690 34003400 36003600862862
450450 470470 698698 960960 17101710 20252025 21102110 22002200 23002300 24002400 25002500 26902690 34003400 36003600806806
450450 470470 698698 960960 17101710 20252025 21102110 22002200 23002300 24002400 25002500 26902690 34003400 36003600790/806790/806
being arranged being arranged has been arrangedhas been arranged
Method 2:
Accelerate the frequency arrangement for implementation of IMT
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2010 2015 2020
and before
2010 2015 2020
Solution to the spectrum insufficiency
Method 3: Acquire more frequency spectrum for IMT
( a) Developed area for mobile service (b) Developing area for mobile service
requirements
(M
Hz
)
ITU forecast on the spectrum requirement in the futureITU forecast on the spectrum requirement in the future
Although this method will take a long time, it is the basic and most effective solution to fulfill the frequency requirement in the future
According to the prediction from ITU, the requirement for mobile service frequency will be around 1300MHz.
At present, only about 1100MHz spectrum identified for IMT, still has hundreds of MHz frequency gap
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Some techniques to enhance spectrum efficiency, i.e. SDR &CRS, are studied.
Considerations:QoS of IMT service should be guaranteed sufficiently when the new techniques
are implementedSome time, supports from administrative policy are neededCannot solve the issue in recent years.
Frequency occupancy status in 698-806MHz700 710 720 730 740 750 760 770 780 790 800
-100
-95
-90
-85
-80
-75
-70
-65
-60
-55
-50698-806 f-band ave power
ave p
ow
er
[dB
m]
Frequency [MHz]
Solution to the spectrum insufficiency
Method 4: Some spectrum efficiency enhancing techniques
Frequency occupancy status in GSM 900
14
Thank You!Thank You!
More spectrum to unlock the constraints on IMT development!