ASMS-TF input for the ERO questionnaire on MS/MSS spectrum usage

Satellite based Broadcast/Multicast layer for the 3rd Generation Mobile Networks

Responses to the questionnaire: this system not being operational yet, only responses to Q6 and Q7 are provided.

Q 6 For a planned system, not yet in operation, please state which systems are planned (related to IMT 2000 bands)

A At what stage is There is a growing interest, in the 3G community, for a satellite-based concept aiming at providing a broadcast/multicast layer, complementary this planning (AP, to the terrestrial IMT-2000 infrastructure. This concept is supported by several satellite operators, manufacturers , and other actors in the contracts for satellite industry, terminal manufacturers, car and related equipment manufacturers. One of the proposed system is known as S-DMB. building satellites) The S-DMB space segment is in its design phase. In particular, activities are on-going in partnership with some terminal equipment manufacturers, with the view to minimising the impact of the satellite reception capability on the terminal cost. Field trials/demos will take place in 1st half 2003 under FP5 contracts, in order to demonstrate the feasibility of direct reception from the satellite of a 3GPP compliant W- CDMA signal by a standard UMTS terminal. Several systems have been filed to the ITU by some administrations, and the construction of the first system is foreseen to start by 1Q 2004.

1 B State frequencies Frequencies: needed and S-DMB will operate in the MSS frequency allocations located in the vicinity of the bands identified for the UMTS terrestrial operations. As S- services to be DMB is tailored to be fully integrated in the UMTS infrastructure, its spectrum use will follow the 3G evolution: offered (data  S-DMB 1st generation will use the 1980-2010 MHz / 2170-2200 MHz MSS allocation, as a complement to 3G terrestrial operation in the rates, equipment) “core” band (2010-2170 MHz).  S-DMB 2nd generation will use the 2500-2520 MHz / 2670-2690 MHz MSS allocation, when and where the 3G terrestrial networks evolve towards the extension band (2520-2670 MHz).

The S-DMB system will also include terrestrial repeaters to provide coverage where direct satellite reach is not possible (typically indoor). The terrestrial repeaters will operate within the MSS band, and therefore will not use frequencies identified for 3G terrestrial use. The extent to which a certain indoor penetration can be achieved directly form the satellite is under study. This will impact the number of terrestrial repeaters required to provide the desired coverage.

Services: By nature, the satellite systems are well adapted to the distribution of information to a large number of users. S-DMB targets this particular application, and addresses the 3G users mass market. S-DMB will enable mobile network operators to deliver rich multimedia content at lower cost towards mobile users with less restriction on the audience served. The S-DMB data server will push or forward multimedia content to the 3G mobile terminals with different capabilities: - Data streaming capability: The multimedia content is played directly upon reception at the mobile terminal. It is used for audio, video multicasting as well as real time data update. A multicast layer will greatly help mobile operators to avoid traffic congestion on their network when real time retransmission of highly popular event drain large audience. - Push and store capability: on demand usage of infotainment, entertainment, software delivery, and rich media applications will be served by pushing the multimedia contents to a local cache for later usage. - Emergency service: With an outstanding coverage, the satellite provides messaging capabilities to inform or alert large audience of general emergency and national security announcements including public security, health, specific threats and concerns. In addition, a low data satellite return link is under investigation. It will use the paired up-link IMT-2000 band allocated to mobile satellite service and UTRA FDD W-CDMA air interface to allow T-UMTS handset to transmit low volume of data. SMS, remote data monitoring, road assistance, emergency telecommunications applications are envisaged. Coupled with Global Navigation Satellite System (GNSS) , the capability is extended to search & rescue as well as tracking features. It can also be used by government as well as public in case of natural or man-made disaster. In order to provide a seamless integration of S-DMB in the 3G infrastructure, S-DMB uses 3GPP compliant protocols and interfaces. The main characteristics of the interfaces are listed below:  UTRA W-CDMA 3.84 Mchip/s waveform  Terminal RF front-end (antenna gain, polarisation, sensitivity,…): as specified by 3GPP for FDD air interface.  Downlink multicasting bit rate: European coverage might be achieved by 1 Mbit/s downlinks per WCDMA carrier (which corresponds to an amount of 1.3 million Mbytes of data transmitted each month over Europe). It is foreseen that at least 4 W-CDMA multiplexes will be necessary to meet the European demand, in conjunction with the development of 3G in the core band (2 GHz), leading to a spectrum demand of 20 MHz, to be located in the MSS allocations nearby the 3G terrestrial core band. With the hopeful success of 3G in the core band, S-DMB will follow service extension towards the 2.5 GHz band, where similar requirements are expected. Therefore, it is foreseen that the whole 2500-2520 MHz / 2670-2690 MHz band will be necessary to provide satellite-based multicasting services.  Uplink user bit rates (messaging/emergency services) : < 10-20 kbit/s per user equipment

2 C Any differences The S-DMB concept can be applied to other areas in the world. This is true in particular in those regions which elected the same frequency in- or outside bands as Europe for 3G deployment. Europe?

Q 7 Do you expect any congestion in this frequency band? no yes see remark

If yes, please indicate when 2003 2004 2005 2006 2007 2008 2009 2010 2011 this would occur:

If yes, what will be the The 2 GHz MSS allocation band will be used in Europe to provide satellite services complementary to the those provided by the 3G terrestrial bottleneck networks. The success of these services is linked to the success of 3G. If 3G is hopefully successful, satellites will provide a very cost effective solution to address a large population of users. It is foreseen that the 2 GHz MSS band could be congested few years after service start (i.e. To + 4 years). The 2500-2520 / 2670-2690 MHz bands constitute the natural extension band for MSS when the 2 GHz band will be congested. For those MSS systems which are integrated to the 3G terrestrial networks (such as S-DMB), access to that band will be necessary when 3G will migrate at 2.5 GHz. Therefore a congestion of the 2500-2520 / 2670-2690 MHz band is also foreseeable, concurrently with the migration of 3G at 2.5 GHz.

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