hash stringlengths 32 32 | doc_id stringlengths 7 13 | section stringlengths 3 121 | content stringlengths 0 2.2M |
|---|---|---|---|
20cc200c31fe90200983950f4b7826ca | 102 015 | 5.2 ES 201 382 | ES 201 382 [2] was criticized because it failed to set out a procedure covering other ETSI Technical Bodies (TBs). Minor revisions have now been made to the document to make it applicable to other ETSI Technical Bodies, mainly by changing the use of the term "Service provider" to "applicant". The document is currently ... |
20cc200c31fe90200983950f4b7826ca | 102 015 | 5.3 TC HF Web site | The current ETSI web site is not fully up to date and its presentation is in need of improvement to make it easier for users to find the desired information. It is suggested that the initial listing of the supplementary services and codes is given in the form of a categorized listing of the harmonized titles as given i... |
20cc200c31fe90200983950f4b7826ca | 102 015 | 5.4 Other TC HF documents | There is no need to make any changes to the content or status of the documents listed in clause 4.4. ETSI ETSI TR 102 015 V1.1.1 (2001-11) 9 History Document history V1.1.1 November 2001 Publication |
0aa44bf70e280cff842f0970b135d0cc | 102 021-12 | 1 Scope | The present document provides the User Requirement Specifications (URSs) for the TETRA Direct Mode Operation. The present document is applicable to the specification of TETRA Release 2.1 equipment. The user requirements contained in the present document are described in non-technical terms and are based on discussions ... |
0aa44bf70e280cff842f0970b135d0cc | 102 021-12 | 2 References | References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the reference document (including any amendments) applies. Referenced documents which ar... |
0aa44bf70e280cff842f0970b135d0cc | 102 021-12 | 2.1 Normative references | The following referenced documents are necessary for the application of the present document. Not applicable. |
0aa44bf70e280cff842f0970b135d0cc | 102 021-12 | 2.2 Informative references | The following referenced documents are not necessary for the application of the present document but they assist the user with regard to a particular subject area. [i.1] ETSI TR 102 621: "Terrestrial Trunked Radio (TETRA); TWC2007 Future of TETRA workshop report". |
0aa44bf70e280cff842f0970b135d0cc | 102 021-12 | 3 Definitions and abbreviations | |
0aa44bf70e280cff842f0970b135d0cc | 102 021-12 | 3.1 Definitions | For the purposes of the present document, the following terms and definitions apply: TETRA Release 2: Work Programme with new terms of reference within ETSI Project TETRA to enhance the services and facilities of TETRA in order to meet new user requirements, utilize new technology and increase the longevity of TETRA wi... |
0aa44bf70e280cff842f0970b135d0cc | 102 021-12 | 3.2 Abbreviations | For the purposes of the present document, the following abbreviations apply: DMO Direct Mode Operation ETSI European Telecommunications Standards Institute FSK Frequency Shift Keying MS Mobile Station PAMR Public Access Mobile Radio PMR Professional (or Private) Mobile Radio RF Radio Frequency SC Smart Card SIM Subscri... |
0aa44bf70e280cff842f0970b135d0cc | 102 021-12 | 4 User Requirement Specification | |
0aa44bf70e280cff842f0970b135d0cc | 102 021-12 | 4.1 Introduction | TETRA networks provide users with advanced services, mobile and portable coverage and typically wide area mobility. Still it may not be possible and economical to fulfil all operational scenarios 100 % of the time with a TETRA network. For specific operational scenarios and in specific circumstances there is a need for... |
0aa44bf70e280cff842f0970b135d0cc | 102 021-12 | 4.2 General requirements | The service requirements for DMO are very similar to those valid for communication via the network. As in TMO also in DMO there is a need for both voice and data services and the communication should be robust, secure, flexible and frequency efficient. As in TMO, Group call is considered to be a very important feature ... |
0aa44bf70e280cff842f0970b135d0cc | 102 021-12 | 4.3 DMO variants | First of all there is a need for DMO radio-to-radio communication. This mode of operation is similar to conventional half duplex radio communication. ETSI ETSI TR 102 021-12 V1.1.1 (2012-08) 8 It is recognised that not all scenarios can be fulfilled with DMO radio-to-radio communication only. For situations where DMO r... |
0aa44bf70e280cff842f0970b135d0cc | 102 021-12 | 4.4 Operational scenarios in more detail | |
0aa44bf70e280cff842f0970b135d0cc | 102 021-12 | 4.4.1 Fire brigade on scene and in-building communication | During their operations fire brigades often have to enter buildings to attack the fire. As in many Public Safety TETRA networks indoor coverage cannot be guaranteed, the fire brigades in those networks operationally use Direct Mode Operation for their on-scene communications within the teams (see figure 1). The command... |
0aa44bf70e280cff842f0970b135d0cc | 102 021-12 | 4.4.2 Police covert and special operation | Many of the operations of special police teams largely benefit from a wide area network. Some of their operations cannot rely on network coverage. An example scenario is an arrest team entering a building to seize a dangerous suspect. Because part of the operation is indoor, where network coverage may be not available,... |
0aa44bf70e280cff842f0970b135d0cc | 102 021-12 | 5.1 Future of TETRA workshop | In the future of TETRA workshop of 2007 requirements were gathered for DMO also. The outcome of the workshop was documented in [i.1]. As some of the respondents had some years of operational experience with DMO implementations while others had no operational experience with DMO yet, the workshop had an interesting mixt... |
0aa44bf70e280cff842f0970b135d0cc | 102 021-12 | 5.2 New Ideas | As can been seen in figure 2 that is extracted from clause 5.2 of [i.1], the main interest of the total of respondents for DMO is in increased range performance, increased service reliability/availability, increased spectrum efficiency and increased data rate. DMO All respondents Increased spectrum efficiency 13% Incre... |
0aa44bf70e280cff842f0970b135d0cc | 102 021-12 | 5.3 Improvement areas | 5+_Exp_Resp DMO Q2 0 5 10 15 20 25 30 35 40 Other DMO Improved performance behaviour of repeaters Concurrent voice and data Duplex voice & data Networking Capability Application Programming Interface (API) standard Multiple call support on gateways & gateway/repeaters Accessory Interface Standards Increased data rate I... |
0aa44bf70e280cff842f0970b135d0cc | 102 021-12 | 6 Requirements developed after 2007 | |
0aa44bf70e280cff842f0970b135d0cc | 102 021-12 | 6.1 Introduction | After the 2007 workshop new customer requirements for DMO have been gathered and documented by ETSI TC TETRA. This clause describes these new requirements. |
0aa44bf70e280cff842f0970b135d0cc | 102 021-12 | 6.2 Callout | |
0aa44bf70e280cff842f0970b135d0cc | 102 021-12 | 6.2.1 Description | Callout is a service for reliably alerting users about an incident that they need to respond to. This is normally sent from a central location to personnel in the field, at work or at home. The Callout Service should have the capability of engaging and informing the users while at the same time giving the central locat... |
0aa44bf70e280cff842f0970b135d0cc | 102 021-12 | 6.2.2 Callout in DMO | When a DMO gateway is used to extend coverage and services to DMO users the callout service should operate transparently to the DMO users. |
0aa44bf70e280cff842f0970b135d0cc | 102 021-12 | 6.3 DMO Edge of Range Indication | DMO Edge of Range Indication introduces a real-time audible (Fire brigade users operating on scene are generally very busy with task and will not monitor the display of their radio) indication of the RF level of the radio signal during the reception of DMO calls. The audible indication should vary as a function of the ... |
0aa44bf70e280cff842f0970b135d0cc | 102 021-12 | 7 Market | |
0aa44bf70e280cff842f0970b135d0cc | 102 021-12 | 7.1 General | A major market for DMO is developing in Germany. The German fire brigade is organised in 100 professional fire brigades with 30 000 active fire fighters and 25 000 voluntary fire brigades with 1 000 000 active fire fighters. For on-scene communication the German fire brigade is planning to use DMO. The estimated MS mar... |
0aa44bf70e280cff842f0970b135d0cc | 102 021-12 | 7.2 Callout | Callout is needed in DMO to support the replacement of pagers used by the German and other Fire Brigades. There are something of the order of 1,4 m fire fighters in Germany many of whom would need this capability. (There are of course other requirements that need to be met such as power consumption, size and performanc... |
0aa44bf70e280cff842f0970b135d0cc | 102 021-12 | 7.3 Edge of Range Indication | Edge of Range Indication is needed by fire fighters where the coverage in DMO is of concern. In some ways it is a less pressing need if Range Extension (see below) is addressed with significant improvement. To date these improvements have been requested by the Netherlands and Belgium. There are 5 500 career fire fighte... |
0aa44bf70e280cff842f0970b135d0cc | 102 021-12 | 7.4 Range Extension | Whilst TETRA has been adopted in a number of fire services around the world it is said that further adoption may be inhibited by the perceived lack of DMO range when compared to analogue radios and some other digital technologies. The size of market that is at real risk here is difficult to assess but it is likely to b... |
0aa44bf70e280cff842f0970b135d0cc | 102 021-12 | 7.5 Spectrally Efficient DMO | Spectrally Efficient DMO has become more of an issue where DMO frequencies are limited and under pressure. This will likely be the case where DMO is used to achieve in-building coverage. The gains from achieving this are uncertain but possibly many thousands of radios. ETSI ETSI TR 102 021-12 V1.1.1 (2012-08) 13 Annex ... |
8077585245204a08c82f18885e1d7948 | 102 021-11 | 1 Scope | The present document provides the User Requirement Specifications for the TETRA "Over The Air management". The present document describes the functionalities which are most needed by the users to manage Over The Air. The present document is applicable to the specification of TETRA Release 2.1 equipment. The user requir... |
8077585245204a08c82f18885e1d7948 | 102 021-11 | 2 References | References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the reference document (including any amendments) applies. Referenced documents which ar... |
8077585245204a08c82f18885e1d7948 | 102 021-11 | 2.1 Normative references | The following referenced documents are necessary for the application of the present document. Not applicable. |
8077585245204a08c82f18885e1d7948 | 102 021-11 | 2.2 Informative references | The following referenced documents are not necessary for the application of the present document but they assist the user with regard to a particular subject area. [i.1] ETSI TR 102 621: "Terrestrial Trunked Radio (TETRA); TWC2007 Future of TETRA workshop report". |
8077585245204a08c82f18885e1d7948 | 102 021-11 | 3 Definitions and abbreviations | |
8077585245204a08c82f18885e1d7948 | 102 021-11 | 3.1 Definitions | For the purposes of the present document, the following terms and definitions apply: TETRA Release 2: Work Programme within ETSI Project TETRA to enhance the services and facilities of TETRA in order to meet new user requirements, utilize new technology and increase the longevity of TETRA within the traditional market ... |
8077585245204a08c82f18885e1d7948 | 102 021-11 | 3.2 Abbreviations | For the purposes of the present document, the following abbreviations apply: CCK Common Cipher Key DM-GATE Direct Mode Gateway DMO Direct Mode of Operation DM-REP Direct Mode Repeater DOTAM Direct mode operation Over The Air Management ETSI European Telecommunications Standards Institute FOTA Firmware Over The Air GCK ... |
8077585245204a08c82f18885e1d7948 | 102 021-11 | 4 Over The Air Management | |
8077585245204a08c82f18885e1d7948 | 102 021-11 | 4.1 General | As MSs accumulate new applications and become more advanced, OTAM configuration has become increasingly important as new updates and services come on stream. OTAM optimises the configuration data updates in MSs and enables the distribution of new software updates to MSs with the necessary settings. OTAM messaging provi... |
8077585245204a08c82f18885e1d7948 | 102 021-11 | 4.2 Over the Air Programming | Currently every MS has to be connected to a programming tool to change features. E.g. cars have to be taken out of service and have to be moved to a Service centre to have the reprogramming done. Such a reprogramming procedure requires careful planning and logistics. During the reprogramming procedure dispatchers may h... |
8077585245204a08c82f18885e1d7948 | 102 021-11 | 4.2.1 TMO over the air Group Management | TMO over the air Group Management enables a dispatcher to send one or more (dynamic) groups to MSs and optionally instruct the MSs to switch to one of the new groups. TMO over the air Group Management also enables the dispatcher to remove one or more groups from MSs. Use cases: • In PSS operations, a dispatcher can ass... |
8077585245204a08c82f18885e1d7948 | 102 021-11 | 4.2.2 DMO Group and Frequency Management | In national TETRA networks for public safety services (PSS) the users also need to communicate independently of the network via DMO. For this purpose, PSS network operators identify frequency channels for DMO usage and assign these frequency channels to dedicated PSS. This assignment depends on the respective PSS and/o... |
8077585245204a08c82f18885e1d7948 | 102 021-11 | 4.2.3 Over the Air Phonebook Management | The phonebook of an MS is used to show the alias of the talking parties in a group call or to start an individual or telephone call. It is more than desirable to enable users to enjoy access to their contacts in their MS, without needing to re-input them for any new MS they acquire. With OTA Phonebook Management it sho... |
8077585245204a08c82f18885e1d7948 | 102 021-11 | 4.2.4 Over the Air management of Parameters and Settings | OTAP should provide a standard mechanism for remote management of selected sets of MS settings and parameters. All customisation parameters need to be accessible via OTAP but in general only certain parameters will need updating. The mechanism will need to be one that only allows authorised entities to make changes. OT... |
8077585245204a08c82f18885e1d7948 | 102 021-11 | 4.3 Firmware Over The Air (FOTA) | Firmware Over The Air (FOTA) provides a way to update or patch the firmware of an MS remotely. FOTA updating technology can be used to deliver new features and services to customers and/or to solve problems in the field caused by a bug in the old firmware. The essence of FOTA is the ability to update the firmware on th... |
8077585245204a08c82f18885e1d7948 | 102 021-11 | 4.4 Over the air management of encryption keys | To distribute or update CCKs, GCKs and SCKs in TETRA the Over The Air Re-keying (OTAR) mechanism is an already existing management tool. This mechanism makes it possible to send in a secure way air interface encryption keys from the SwMI over the air directly to an MS and can be applied as long as an authentication key... |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 1 Scope | The present document has been produced to assist the following potential readers to understand the aims and principal features required of the HIPERACCESS standards: • Regulatory bodies responsible for spectrum allocation and licensing of systems. • Members of other BRAN groups. • Members of other ETSI projects and bod... |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 2 References | For the purposes of this Technical Report (TR), the following references apply: [1] ITU-T Recommendation G.723.1: "Dual rate speech coder for multimedia communications transmitting at 5.3 and 6.3 kbit/s". [2] TS 102 003: "Broadband Radio Access Networks (BRAN); Common DLC layer Service Interface for BRAN Systems". [3] ... |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 3 Definitions and abbreviations | |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 3.1 Definitions | For the purposes of the present document, the following terms and definitions apply: bandwidth on demand: ability to deliver a dynamically varying data rate appropriate to the particular service being demanded downlink: data direction from an Access Point (AP) to an Access Termination (AT) uplink: data direction from a... |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 3.2 Abbreviations | For the purposes of the present document, the following abbreviations apply: ABR Available Bit Rate AP Access Point APC Access Point Controller APT Access Point Transceiver ARQ Automatic Repeat reQuest AT Access Termination ATM Asynchronous Transfer Mode ATPC Automatic Transmission Power Control BER Bit Error Rate BRAN... |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 4 Context of documents | The present document is only concerned with HIPERACCESS, for which a proposed document structure is given in figure 1. HIPERACCESS provides outdoor, high speed (at least 25 Mbit/s data rate) fixed radio access to customer premises and is capable of supporting multi-media applications. HIPERACCESS REQUIREMENTS AND ARCHI... |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 4.1 General documents | The present document is the System Overview that together with the System Requirement document (see TR 101 177 [3]) gives the basic ideas about the system and the reasons behind choices within the technical specifications. Physical layer (PHY) A unique PHY layer is envisaged. The specification will define a fully inter... |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 5 Users, services and facilities | |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 5.1 Who is HIPERACCESS for? | There is an increasing need for delivery of broadband digital communications services to individuals, households and businesses of all sizes. Whilst data rates supporting basic digitized voice services remain within the capability of existing wired networks, higher speeds are increasingly necessary. High speed Internet... |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 5.2 Traffic and service requirements | HIPERACCESS Systems are bearers for a wide diversity of applications. Not all applications need to be supported in all implementations of such systems. They may support a subset of the total set of possibilities, provided the services are supported in the specified manner. The data rate supported shall be variable on d... |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 5.3 Performance issues | HIPERACCESS systems will behave, from the user perspective, like wired systems. The end users need not be aware that the services are delivered via radio. The performance in terms of access delays, bit error ratios, route set-up times and availability is to be comparable with the equivalent competing services. Quality ... |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 5.4 Comparison for HIPERACCESS | HIPERACCESS systems will compete with a variety of alternatives, some of which are already available and some of which are expected to become available over the next few years. These include: • xDSL over copper pairs. • Microwave Distribution Systems. • DVB return channel systems. • Cable TV. ETSI ETSI TR 102 003 V1.1.... |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 5.5 Application as UMTS backhaul | |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 5.5.1 Rationale | HIPERACCESS due to its characteristics is a good and economical candidate as one of the technologies involved in the realization of UMTS backhaul. The large bandwidth requirement and high base station concentration in micro and pico cells of UMTS deployment will require a large bandwidth interconnection system capable ... |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 5.5.2 Functional requirements | It has been found that the UMTS-Backhaul is a potential application candidate for HA system. Indeed an efficient strategy to connect the UMTS RNC with different Node B with a HA-PMP architecture would be to consider a Dynamic bandwidth allocation (e.g. dynamic LL). This strategy requires a deep analysis and considerati... |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 6 System features and architecture | |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 6.1 General | HIPERACCESS network deployments will potentially cover large areas (i.e. cities). Due to large capacity requirements of the network, millimetre wave spectrum will be used hence limiting transmission ranges to a few kilometres. A typical network will therefore consist of some number of cells each covering part of the de... |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 6.2 Physical (PHY) layer | The architecture of the PHY-layer is determined mainly by the following HA-features: • Single carrier transmission. • Support of different duplex schemes: FDD, H-FDD and TDD. • Use of adaptive coding and modulation. Scrambler FEC Encoder Preable Prepend Symbol Mapper Pulse Shaping Modulator & Physical Interface To RF C... |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 6.3 DLC | The essential features of HIPERACCESS DLC are: • efficient use of the radio spectrum; • high multiplex gain; • maintaining QoS. Multiplexing means that m subscribers can share n radio channels (m being larger than n), allowing a better use to be made of the available frequency spectrum and at a lower equipment cost. Th... |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 7 Network aspects | This clause describes the general configuration of HIPERACCESS networks, their interfaces with core networks and with terminals. |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 7.1 System configurations | Figure 12 shows the basic system arrangement, in which user terminal equipment connects via interface W.3 with an Access Termination (AT). User terminals may support one or more of a range of user services, according to the particular system specification. A system will normally deploy many Access Terminations. ATs com... |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 7.2 Interfaces | The main interfaces of HIPERACCESS systems are shown in tables 6 and 7. Some external interfaces (such as W.2 and W.3) are defined in the system but are specified by other bodies. Table 6: Interfaces description Reference Interface Points Description W.1 Access Termination-Radio Relay Access Termination-Access Point Ac... |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 7.3 Other interfaces | Apart from the air interface and the main external interfaces, other interfaces exist within HIPERACCESS networks. Internal interfaces between components of Access Terminations and between components of Access Points are specified at the logical level only. The actual implementation can vary from system to system. |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 7.4 Security aspects | HIPERACCESS systems are intended to form part of wider overall networks. The existence of a radio access part means that systems may be subject to attempted interception of the over-the-air signals. Security features will be needed in the end to end network as follows: • Prevention of unauthorized eavesdropping. • Supp... |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 7.5 Network performance | When HIPERACCESS system is used onto a access network based on ATM, the broadband radio systems should also be ATM based. In order to guarantee the Service Level Agreement requirements for services provided over ATM, the requirements defined by ITU-T Recommendations listed in table 8 should be satisfied. Table 8: List ... |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 7.6 ATM requirements | |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 7.6.1 Traffic control requirements | HIPERACCESS system should be able to handle the different ATM transfer capabilities defined in ITU-T Recommendation I.371 [19] (also referred to by the acronyms CBR, VBR, ABR and UBR) and related to the classes of QoS defined in ITU-T Recommendation I.356 [16]. In order to be in a position to assess the traffic priorit... |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 7.7 Network management | The network element management requirements by functional category can be defined by five categories, according to ITU-T Recommendation M.3010 [21]. These are: a) Configuration Management. b) Performance Management. c) Fault Management. d) Security Management. e) Accounting Management. The functions required to operate... |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 7.8 System gain, coverage and deployment | This clause is provided to exemplify typical system gain coverage distances and deployment for the 42 GHz bands and by using the APT class 1 (EIRP = 33 dBmi). 7.8.1 Evaluation of required system gain |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 7.8.1.1 Assumptions and requirements | In the following it is reported an evaluation of the required system gain taking into account the HA system parameters. Basic assumptions: • Coverage radius: 2,3 km • Rain zone: ITU-R K-zone • Horizontal polarization The following requirements depend on the frequency band: Operating frequency band 40,5 GHz to 43,5 GHz ... |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 7.8.1.2 System gain calculation | The following refers to the 41 GHz band with a 99,985 % availability. System Gain F = 40 GHz to 43,5 GHz V ( Rx ) V’ ( Tx ) AT AP V’( Tx ) V ( Rx ) Figure 13: Reference system diagram ETSI ETSI TR 102 003 V1.1.1 (2002-03) 29 Considering that: • Rain attenuation (Long term statistics) (see note 1) = 23 dB • Free space l... |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 7.8.2 Reference radio system conditions | The following radio system conditions should be considered as reference requirements for the HIPERACCESS system since they represent the typical scenario for such a system. The following items are assumed: • Required System Gain (@ 99,985 %) = 99 dB. • Channel spacing: DownLink 28 MHz, Uplink 28 MHz. • Reference cellul... |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 7.8.3 Void | |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 7.8.4 Availability and quality BER thresholds | The following BER thresholds are used in the following: • BER = 10-6 for link availability (that implies a CLR of about 10-5). • BER = 10-11 for link quality. |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 7.8.5 RF Receiver input level thresholds | The receiver sensitivity corresponding to a given C/N for an equivalent noise bandwidth Bn and a noise figure NF is: Rxloss loss N C B NF N S n th + ∆ + + × + + = ) ( log 10 10 0 where: • ∆loss includes all implementation losses • Rxloss is the receiver branching loss Table 9 shows the required input level receiver thr... |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 7.8.6 RF transmit output power | The RF transmit output power in this clause refers to the RF connection (point V' of figure 12). The following figures are evaluated not considering the interference degradation effects on receiver threshold and the tolerances on transmit output power level. Considering that: • Required system gain = 100 dB (at 42 GHz)... |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 7.8.7 Coverage range sensitivity | The power amplifier minimum requirement of 15 dBm can be played by different operators in different ways. This clause shows the coverage and availability, in different frequency bands and different rain zones, that are achievable with the same transmit output power requested for the reference scenario in the 40 GHz ban... |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 7.8.8 Void | |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 7.8.9 Consequences due to the interference and PTx tolerances | Given the thresholds and transmit output power assumed as a typical reference scenarios, the following consequences are determined. |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 7.8.9.1 Interference scenarios | Considering downlink and uplink transmission we have to face different interference scenarios due to the fact that the transmission is continuous and generated by the same AP in downlink, while it is burst based and generated by different AT in uplink. The worst level of interference expected in downlink in some partic... |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 7.8.9.2 Coverage reduction due to interference and tolerances (PHY mode 1) | In the areas where there is an interference of about C/I = 14 dB, the receiver sensitivity degradation due to interference on PHY mode 1 (the one used for availability) is about 1 dB. In this case the worst scenario in terms of tolerances (2 dB for amplifier, 1 dB + 1 dB due to antennas) has to be considered. |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 7.8.9.3 Availability of the radio link at 64QAM (PHY mode M4) | Everywhere the interference scenario allows to use 64QAM in clear sky conditions, the reduced receiver sensitivity (= -69 dBm @ PHY mode M4) reduces the high efficiency link availability to about 99,5 % at the cell border (due to reduced system margin of 8 dB, see table 11). Even considering 3 dB degradation due to int... |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 7.8.9.4 RF Spectrum emission issues | The HIPERACCESS system is suitable to be deployed using the cellular pattern shown in figure 2, which employs two frequency and two polarization. The deployment with the reuse of the same frequency on each sector is very critical if not impossible. Therefore, it is always possible having non adjacent channels within a ... |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 7.8.10 Adjacent and Co-channel Interference requirements | The limit of adjacent channel interference is given by: NFD N C N C cc i − = The Co-channel interference C/Ncc shall met the following limit(implementation losses not considered): CCI requirements Description BER = 10-6 Threshold degradation 1 dB 3 dB Signal to Interference level C/I (dB) C/I (dB) 4QAM,2/3 12 9 4QAM,1 ... |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 7.9 Multi-dwelling scenarios | As defined in the System Requirements [3], HIPERACCESS system can be deployed for residential customers and for highly dense urban areas. Consequently the most frequent environmental condition at the customer site is based on multi-tenant buildings. In this case it will be necessary to share a single antenna, with the ... |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 8 Traffic and spectrum aspects | The following total spectrum estimation for Fixed Wireless Access Networks, which could be satisfied by HIPERACCESS, included in this clause, is based on a series of assumptions yet to be validated. Other scenarios have been considered, which vary the assumptions made relating to key parameters. These give results, whi... |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 8.1 Service hypothesis | The model used for the spectrum evaluation is based on the service hypothesis shown in table 12. Table 12: Service hypothesis Capacity [kbit/s] Residential [%] Business [%] Down Up Penetration Utilization Penetration Utilization Voice 64 64 80 7 50 10 ISDN 144 144 10 7 5 10 Video Conference 384 384 10 7 5 10 VoD 3 000 ... |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 8.2 Area definition parameters | Two different typologies of area have been considered. The first one, reported in table 13, refers to high concentration residential areas. The second one, depicted in table 14, is an example of a high business concentration area. Case 2 differs from Case 1 in the concentration of residential and in the business distri... |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 8.3 Capacity per radio channel | The capacity per radio channel, considered for the spectrum evaluation, is reported in table 16, with the hypothesis of both downlink (DL) and uplink (UL) channel size of 28 MHz. Moreover a minimum modulation scheme with four level of modulation has been taken for both DL and UL. Adaptive modulation, with an average ga... |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 8.4 Traffic model | The capacity requirement evaluation is based on the sum of the data rate per each single customer and per each kind of service. This kind of calculation represents better the behaviour of dynamic channel allocation. The use of models such as Erlang B or Erlang C in order to define a number of channels on a type of serv... |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 8.5 Spectrum evaluation | |
4eb80c8c468736d26cfc26100cd7008b | 102 003 | 8.5.1 Case 1: high residential area | Table 18 reports the calculation of capacity per sector and number of channel required with the hypothesis of a penetration of 20 % for the City and City/Urban environment and 30 % for the urban environment. All the calculations have been done considering a reuse factor of 2. In this case the evening busy hour has been... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.