3GPP means the third generation of mobile communication standard partner project, mainly developed the third-generation technology specification based on the GSM core network, UTRA is an unlimited interface, including PCG (project appointment group) and TSGS (Technical Specification Group). Includes the following organizations:
1, European ETSI
2, Japan's ARIB
3, Japan's TTC
4, South Korea TTA
5, US T1
And 3GPP2 is on the 3GPP, remove ETSI, change T1 to TIA
3g concept
1G: Representative of the first generation of mobile communication technology: analog mobile network that has been eliminated
2G: Take digital voice transmission technology as the core, bandwidth 9.6kb / s representative: GSM
2.5g: is based on
2G and
Transition type between 3G, bandwidth 171.2kb / s, compared
2G is mainly at speed
Increased in degrees and bandwidths, enabling existing GSM networks to easily implement simple and high-speed data packets
Access representative GPRS
3G: It has improved on high speed, broadband, up to date
2M data transmission rate, mainstream technology is
CDMA technology, representing WCDMA (Europe, Japan), CDMA2000 (US),
TD-SCDMA (medium)
Where WCDMA and CDMA2000 are FDD mode: frequency division duplex, you need to use two bands to send and receive
TD-SCDMA is TDD mode: time division duplex, using the same frequency band, but in different time slots
Detailed introduction of three technologies:
WCDMA is based on GSM network developed
3G technical specifications, is the broadband CDMA technology proposed in Europe, which is basically the same as Japanese broadband CDMA technology, and is currently being further integrated, evolving strategy: GSM-GPRS-EDGE-WCDMA
CDMA2000: Wideband CDMA technology developed by CDMA (CDMA IS95) technology, is pushed by the United States, evolutionary strategy: CDMA IS95-CDMA20001X-CDMA2003X, China Unicom has built CDMA networks
TD-SCDMA: Time-divided synchronous CDMA, is the proposal of Datang Telecom, this standard is not passed
2.5G intermediate link, directly
3G transition
3GPP composition consists of four parts:
<1> Organizational Partner
<2> Market Representative Partner
<3> Personal member
<4> Observer
Organization partners are a country, region or those officially recognized open standards, such as China's CCSA (China Communications Standardization Association), they have the right and abilities to define national or regional standards, publish these standards, and Let these standards implement national or regional, and of course they must sign the Partner Project Agreement.
Organizational partner's task
1. Approve and maintain 3GPP activities
2. Maintain partner project description
3, decide to create or stop the technical specification group
4. Approve their scope of activity and authorization survey
5. Approval organization partners' funding needs
6. Distributing the personnel and funds provided by the organization partner to each project group
7, as the above-mentioned subject as the time related to them
8, determine the basic policy or strategy of 3GPP
Market representative partners analyze market demand, maintain partner project agreements, ratify 3GPP applications, they don't have the right to define publishing standards, sign partners project agreements, responsible for 3GPP activities
Personal members are membership in organizational partners, and individual membership is also open to those legal entities that support 3GPP.
task:
1. Contribute to the technical or other aspect of the technical specification group within 3GPP
2, use 3GPP members to expand the feasibility
Observe: In fact, observers are those who want to be partners.
