Advanced XGP (XGP standard version 2)
XGP Forum developed XGP version 1.0 (XGP1) as a Broadband Wireless Access (BWA) system in 2008. After a while, however, we faced the great demand for enormous broadband traffic. Furthermore, the competition with other BWA systems forced us to establish the ecosystem to facilitate equipment cost reduction and cost effective deployment.
Under these conditions, XGP Forum advanced the studies to materialize three issues; (1) Higher speed, (2) Improvement of coverage areas, (3) Harmonization with other global TDD systems. In 2010, we developed XGP version 2 (XGP2), which supports 20MHz bandwidth, SC-FDMA, asymmetry frame structure, extension of frame length, and MIMO. In 2012, we published XGP version 2.3 (XGP2.3) to achieve more harmonizing with other global TDD systems.
(1) Higher speed
Supporting maximum occupied bandwidth of 20MHz, asymmetry frame structure, extension of frame duration, and MIMO, we have realized the maximum downlink speed over 100 Mbps. Also, it enables the more effective frequency use according to type of contents.
(2) Improvement of coverage areas
Maximum transmission power at Base Station increases from 10W to 40W, and Maximum absolute gain of antenna at Base Station increases from 12dBi to 17dBi. Both changes contributed to extend the coverage areas and improve the penetration loss in indoor area.
(3) Harmonization with other global TDD system
In order to enhance XGP and establish broadened ecosystem, we developed Advanced XGP that harmonize with other global TDD systems. We adopted SC-FDMA, modifications of adjacent channel power, spectrum mask and tolerance limits of the intensity of unwanted emission in spurious domain.
Outline specifications of both XGP (XGP version 1) and Advanced XGP (XGP version 2.x) are shown in the table below, and frame image of combination scheme with SC-FDMA and TDMA is also provided.
< Reference >
Japan Ministry of Internal Affairs and Communications,
Information and Communications Council,
Information and Communications Technology sub-Council.
- 86th meeting: Document 86-3-1 and 86-3-2
- 75th meeting: Document 75-2-1 and 75-2-2