(NetworkWorld.Com)

China on Wednesday lauded Taiwan’s launch of a 3G mobile network using Chinese TD-SCDMA technology as a successful display of how they can work together on technical standards.

Executives and officials from both places on Wednesday concluded a technical standards forum in Taipei where they discussed TD-SCDMA (Time-Division Synchronous Code Division Multiple Access), as well as the creation of standards for LCD screens, LED technology, audio/visual devices, Internet TV, green technologies and more.

TD-SCDMA, developed in China, is one area of technology on which the nation has hoped to work more closely with Taiwan. China and Taiwan have worked more closely in recent years on the joint development of technical standards in the hopes of matching Taiwan’s technology prowess with China’s huge market. Their goal is to develop technical standards so they don’t have to rely on or pay license fees for standards developed in the West, and ultimately to create their own global standards.

The TD-SCDMA trial network in Taiwan will be a good place for local handset makers and network equipment developers to test TD-SCDMA devices, China’s Ministry of Industry and Information Technology said Wednesday.

Companies from Taiwan and China also gained experience in dual-network compatibility by researching ways to deploy TD-SCDMA technology alongside WCDMA (Wideband Code Division Multiple Access) technology, the Ministry said. Its statement concluded with the hope that China and Taiwan can deepen cooperation in areas such as 3G services, wireless city projects, and TD-LTE (Time Division – Long Term Evolution), a 4G mobile broadband mobile broadband standard promoted by China.

The mutual work on technology standards is also a way to cooperate peacefully. The two split in 1949 amid civil war and China has considered Taiwan a renegade province ever since, with a standing threat to attack if the island formally declares independence. The 2008 election of a more China-friendly president in Taiwan has brought about much warmer relations between the two places.

Taiwanese 3G mobile operator Vibo Telecom launched the TD-SCDMA trial network on Tuesday in Taipei,. It is one of the few companies running a TD-SCDMA trial outside of China. China’s Vice Minister of Industry and Information Technology, Lou Qinjian, attended the launch ceremony.

The launch of the network is the result of several trips made by officials and executives from China to Taiwan. In August, for example, the chairman of China Mobile, the world’s largest mobile network operator, spent several days in Taipei meeting with companies to promote TD-SCDMA. Taiwanese smartphone developer High Tech Computer (HTC) agreed to launch seven TD-SCDMA smartphones by the end of 2010, it announced during a news conference with China Mobile during the visit.

The head of HTC noted that China Mobile is an important ally due to the size of its customer base. China Mobile had 513.5 million subscribers at the end of October, according to its Web site. The company’s goal is to reach 3 million 3G subscribers by the end of this year, up from the 2.3 million it reported last week.

(Taken from DailyWireless.Org)

China issued 3G licenses in January, 2009, to three telcos, China Mobile,China Telecom and China Unicom. The Chinese Ministry of Industry and Information Technology said the country would invest CNY400 billion (US$59 billion) in the next three years. China Mobile received a licence forTD-SCDMA, the domestically-developed 3G standard, China Telecom will use the US-developed CDMA2000 and China Unicom will use WCDMA(GSM).

Reuters reports that two-thirds of China Mobile’s 3G contracts have now been bid out, with the remainder to be announced in August. China Mobile’s 3G service is expected to bring TD-SCDMA service to 70 percent of the country and cover 200 cities.

Time Division-Synchronous Code Division Multiple Access (TD-SCDMA), unlike other cellular systems, uses only a single channel for both talking and listening. Switching is fast enough to allow simultaneous conversations. The advantage, say proponents of TD-SCDMA, is that one channel isn’t wasted while idle.

Chinese companies are getting 88 percent of latest TD-SCDMA orders, reports Telecomm Magazine. China Mobile’s latest tender was worth CNY8.6 billion (US$1.26 billion) for the expansion of its home-grown TD-SCDMA 3G services.

ZTE got the biggest share of 34 percent, followed by Huawei with 22 percent while Datang and domestic partner, FibreHome Technologies were awarded 21 percent share of the order. Nokia Siemens Networks won 7 percent, and China Putian, New Postcom and Ericsson, each won 5 to 6 percent share.

TD-SCDMA Technical Summary

• Frequency band: 2010 MHz – 2025 MHz in China (WLL 1900 MHz – 1920 MHz)
• Minimum frequency band required: 1.6MHz
• Frequency re-use: 1 (or 3)
• Number of slots: 7
• Modulation: QPSK or 8-PSK
• Voice data rate: 8kbit/s
• Circuit switched services: 12.2 kbits/s, 64 kbits/s, 144 kbits/s, 384 kbits/s, 2048 kbits/s
• Packet data: 9.6kbits/s, 64kbits/s, 144kbits/s, 384kbits/s, 2048kbits/s

Ericsson has won mobile network contracts from China Mobile and China Unicom. China Mobile has contracted Ericsson to deploy green technologies, and expand its GSM/GRPS network in 18 provinces. The deal is worth $1 billion.

As of the end of June, China Mobile, the world’s largest cellular operator, services 72 percent of the country’s cellular market with 493.1 million mobile customers, against China Unicom’s 140 million and China Telecom’s 36.9 million. China Mobile has an Internet user base of 139 million as of Q1 2009.

China had 627.3 million mobile-phone users at the end of October in 2008. India is now the second largest wireless market in the world, with some 415.25 million, according to the latest figures fromTelecom Regulatory Authority of India (TRAI). The United States is the 3rd largest wireless market,according to the CTIA, with some 263 million mobile-phone users.

• Network Selection for non-3GPP Access
• Network Improvements for Machine-type Communications
• Registration in Densely-populated area (RED)
• Enhanced Home NodeB / eNodeB continuation of Rel-9
• IMS Service Continuity – Inter Device Transfer enhancements
• EEA3 and EIA3 (new Encryption & Integrity EPS security algorithms)
• Study on Mobile Haptic Services
• Study on Policy solutions and enhancements
• Study on IPv6 MigrationStudy on SR-VCC Enhancements

Items moved from Rel-9 to Rel-10

• IMS aspects of Architecture for Home NodeB
• GTP-based S8 chaining
• Multi Access PDN Connectivity
• Study on advanced requirements for IP interconnect
• Study on Unauthenticated PS Emergency Calls
• Study on Study on Personal Broadcast Service
• Study on LCS support in SAE for non-3GPP accesses
• Study on System enhancements for the use of IMS services in local breakout and optimal routing of media
• Study on Intra Domain Connection of RAN Nodes to Multiple CN Nodes
• Study on IMS Evolution
• Study on enhancements to IMS border functions for IMS Interconnection of services

Air interface framing is illustrated as in figure below. A super frame is made up of 4096 radio frames. Each radio frame is made up of 15 timeslots. A timeslot can be allocated to either UL (uplink) and DL (downlink) transmission.

Within each timeslot several Resource Units (RUs) (sometime termed “codes” or “bursts”) can be supported. An RU is defined as a single code within a single timeslot. As defined in 3GPP TD-CDMA downlink supports two spreading factor, SF1 and SF16. IPWireless implements both SF1 and SF16 for the downlink.

Thus, the maximum number of codes supported in the DL is 16xSF16 or 1xSF1 code per time slot. When using SF16, the minimum code granularity on the downlink is 4, meaning that each user gets assigned at least 4 codes. The upper bound on the number of multiples of 4 codes allocated per slot is determined by C/I conditions and traffic conditions. On the uplink, spreading factor 1, 2, 4, 8, and 16 are allowed.
In a public wide-area TDD system such as that of IPWireless the UL and DL transmissions are synchronized to eliminate the possibility of NodeB-to-NodeB and UE-to-UE interference.