1、I CEPT T/SF*bb*E 90 W 2326434 0009542 3 W _ T/SF 66 E Page 1 (ti- Recommendation T/SF 66 (Nicosia 1990 (CAC) SERVICES AND FACILITES ASPECTS OF DIGITAL EUROPEAN CORDLESS TELECOMMUNICATIONS (DECT) Recommendation proposed by Working Group TIWG 7 “Services and facilities” (SF) Text of the Recommendation
2、 adopted by “Telecommunicatiois” Commission: “The European Conference of Posts and Telecommunications Administrations, consideriiig - cordless telephones developed in accordance with Recommendations T/R 24-03 E, T/SF 30 E, T/CS 34-18 E and - there remains a requirement for an integrated service whic
3、h can address the following markets: Residential, - the service must be capable of offering voice and non-voice circuit and packet mode connections in a flexible - the quality and value of service must be at least equal to that offered by existing wired terminals, - market studies indicate expected
4、user densities of up to 1 per 20 mz throughout the service area with 0.2 Erlangs T/SF 42 E are solutions for the short and medium term only, Business, Public and Telecommunications Network Distribution, cost-effective manner, O per user and corresponding capacity requirements of up to 120,000 E/km2,
5、 recommends that therefore Digital European Cordless Telecommunications applications should be developed on the basis of the user requirements and service characteristics given in Annex A.” Edition of JuLy 10, 1990 7 7 CEPT T/SF*bb*E 90 232b414 0009543 5 W 1. 2. 2.1. 2.2. 2.2.1. 2.2.2. 2.2.3. 2.2.4.
6、 2.2.5. 2.2.6. 2.2.7. 2.2.8. 2.2.9. 2.3. 2.3.1. 2.3.2. 2.3.3. 2.3.4. T/SF 66 E Page 3 Annex A DEFNION Digital European Cordless Telecommunications (DECT) will provide wireless links to private and public telecommunications networks, supporting both circuit and packet switched connections of voice an
7、d non-voice services. DESCRIPTZON General DECT is an integrated approach to several interrelated market segments. It will permit customers to use their personal DECT handset or terminal, at home, at work and in public locations to provide all the normal telecommunications facilities expected at thes
8、e sites through cordless radio links. It will also permit private and public networks to be extended using the same access technology to provide economic and flexible links, with benefits of an integrated service. Terminology Base Unit A functional configuration of some or all of the fixed component
9、 parts of a DECT system. These would include one or more radio equipments attached to an antenna system. It could also include common control functions and interfaces to PSTN or ISDN networks. Operating Range The radial distance from a base unit over which acceptable service quality is provided. Cov
10、erage The area from a base unit over which acceptable service quality is provided. Single Cell Systems Coverage provided by a single antenna or single continuous distribution system, such as a radiating cable. Multicell Systems Coverage provided by multiple antennas or distribution systems. Roaming
11、The ability of users when moving locations to gain access to separate DECT systems, possibly run by different service providers. Hando ver In multicell systems this is the procedure of transferring coverage provided by one base unit (or one cell) to another as users move around their locality during
12、 a call in progress. Radio Head-End This is the radio equipment part of the base unit. Authentication The procedure that ensures the correct identification of the handset and/or user. Markets All market segments for DECT require either voice or non-voice or integrated voice/non-voice capability cove
13、ring the following: Residential-private use in houses and apartments. Business systems-private business use ranging from simple single cell systems to large complex multicell systems. Public-localised public access to private and public telecommunications networks, providing outgoing calls only (Tel
14、epoint) and possible incoming cail enhancement. Network Extensions-extended and supplementary access to private and public telecommunications net- works. Edition of July 10, 1990 7. T/SF 66 E Page 4 3. USER REQUIREMENTS These are divided into minimum and additional requirements according to common o
15、r specific application or market segment. 3.1, Voice Service Requirements 3.1.1 I Common Requirements 3.1.1.1. Minimum Functionality These are common to residential, business and public applications. - Function as an equivalent replacement for a wired standard telephone connected directly or indirec
16、tly - Operating range to cover user premises. - Signalling capacity to support standard telephone features. - Dialling and calling security. - Interface with analogue PSTN and/or ISDN. - Emergency service calls. - Secure authentication of handset to an appropriate level corresponding to each applica
17、tion. 3.1.1.2. Additional Functionality (examples) - Non-voice transmission, with ability to communicate up to maximum available DECT transmission - Air-interface voice, and non-voice, privacy. - Hands-free operation. - Handsets serving a combination of market segments OS services. (e.g. via PABX) t
18、o a PSTN. capacity . 3.1 -2. 3.1.2.1. Minimum 3.1.2.2. Additional Requirements for Residential Use - More than one PSTN line. - Two or more handsets. - Handset inaccessible indication from the system at call Set-up. - Intercom, including handset to handset, via the base unit. - Call transfer between
19、 handsets. - Base unit ringer or independent ringer unit. 3. I I 3. 3.1.3.1. Minimum Requirements for Business Use - Normal pbx functions must be supported. - Handset inaccessible indication at base unit from the system at call Set-up. - Secure authentication of handset user. - Independent systems i
20、nterconnected to achieve coverage expansion without handover. - Handsets can enrol on other base units. - Message (acknowledged paging) service. - Roaming. - Handover during call. - Bearer services (e.g. ISDN). - Teleservices (e.g. teletext and fax). - Handset or terminal enrolment. - Support for sy
21、stems or highly variable user densities. - Terminals mounted in a warehouse vehicle. 3.1.3.2. Additional Edition of July 10, 990 , 3.1.4. 3.1.4.1. 3.1.4.2. 3.2. 3.2.1. 3.2.2. 3.3. 3.3.1. 3.3.2. 3.3.3. O 4. 4.1. 4.1.1. 4.1.2. 4.1.3. 4.1.4. 4.1.5. 4.1.6. 4.1.7. T/SF 66 E Page 5 Requirements for Public
22、 Use Minimum - Out going calls only (e.g. Telepoint). - User indication of service availability on handset. - Multiple independent network operation. Additional - Secure authentication of the user. - Incoming (e.g. local log-on). - In-call handover to adjacent Telepoints. - Outgoing calls queuing ca
23、pability for access to radio interface. - Tandem use with other mobile systems, appropriate to car, train, plane and ship. Non-Voice Service Requirements (Combined with voice function where appropriate) These are for either primarily static or portable users and are divided as follows: Teleservice G
24、eneral Requirements - Remote terminal service, supporting protocols such as X and OS1 VT. - Batch file transfer, supporting protocols such as File Transfer Access and Management (FTAM). - Real-time file access, supporting protocols such as X.400 protocols P3 and P7. - General ISDN connection based s
25、ervices. Bearer Service General Requirements - Fast link establishment times, under 50 ms (not including terminal verification). - Variable rate communication, up to 265 kbit/s. - Variable transaction times, 100 ms to 10 s. - Predominantly unidirectional transmission. Network Extension General Requi
26、rements Extension to Cellidar Radio - DECT Telepoint in a mobile environment, e.g. on trains. - DECT portable access (eg. to GSM) via, say, car mobile cellular interface. Extension to Public Networks Provides access from customer premises to Public Telecommunications Network distribution point. Dist
27、ributed Networks - Centrex type service. - Distributed radio head-end with centralised processing; such as codecs, control and signalling. - Distributed radio coverage. - Transmission ranges over cable up to 5 km. SERVICES CHARACTERISTICS General Digital transmission is required to maximise capacity
28、 and flexibility of the service. The level of privacy must be at least comparable to that offered by wired services. The cost of basic DECT services must be minimised for mass market applications. Compact light and low power consumption handsets and terminals are required. Operation outside in norma
29、l climatic conditions is necessary for portable equipment. Interoperatability of handsets or terminals between ail applications in the different market segments shall be possible but not mandatory. Provision for non-voice services shall not penalise the cost of implementing a basic voice-only applic
30、ation. Edition of July 10, 1990 - - _ CEPT T/SF*bb*E 90 m 2326414 0003546 O m T/SF 66 E Page 6 4.1.8. 4.1.9. 4.1.10. 4.2. 4.2.1. 4.2.2. 4.2.3. 4.2.4. 4.3. 4.3.1. 4.3.2. 4.3.3. 4.4. 4.4.1. 4.4.2. 4.4.2.1. 4.4.2.2. 4.4.2.3. 4.4.2.4. 4.4.2.5. 4.4.2.6. 4.4.2.7. 4.4.2.8. 4.4.2.9. 5. 5.1. Non-voice servic
31、es must limit their transmission requirements to the minimum required at any time during a communication. All applications must coexist without causing harmful interference to each other. To provide maximum flexibility all radio links must be available for all applications. Quality Communication qua
32、lity shall be comparable to that offered by wired links. The time taken to establish a link should be below 1 s for voice services and 50 ms for non-voice services. Failure to establish a link due to its availability and radio coverage, within the appropriate time, should be below 1%. Forced curtail
33、ment of links, due to poor radio coverage and congestion, should be below 0.1% and preferably below 0.01 %. Capacity DECT should allow for the following traffic densities. Residential markets, at 0.05 Erlangs per terminal, busy-hour trafic of: 150 E/km2 in suburban areas (detached houses), 200 E/km2
34、 (4-flOOS buildings) in urban apartment block areas and localised peak densities of 1,000 E/km2 (4-flOOS buildings), which is equivalent to 250 E/km2 per floor. Business markets, at 0.2 Erlangs per terminal, busy-hour trafic of 3,000 E/km2 (3-floor buildings) in suburban areas, 120,000 E/km2 (20 flo
35、or buildings) in city centres and localised peak densities of 1 user per 20 m2 giving 10,000 E/km2 per floor. Public markets, at 0.1 Erlang per terminal, busy-hour traffic of 900 E/km2 at major city transport nodes (e.g. railway stations) and up to 5,500 E/km2 at airport terminals. Security General
36、Access to private and public telecommunications networks must be controlled through a secure authorisa- tion procedure. This necessitates regular transmission of identification information over the DECT com- munication links. It also requires a very secure access authentication procedure. The level
37、of security should be comparable to that obtained from wired links. Telepoin t For public Telepoint type services the following are required. Telepoint handset authentication shall make provision for use in more than one country. Portable parts may gain access to more than one Telepoint service prov
38、ider. Each Telepoint service provider shall have a unique identity. There shall be a Telepoint service request code. Each Telepoint-usable handset shall have a unique number which cannot be altered by the user. The numesical form of account identities shall be the same for all Telepoint service prov
39、iders. A method of authenticating the user to the handset is required, but its use is optional. The handset and base-unit shall be capable of completing the authentication process within 2 s and indicating this to the user. Authentication both locally (Telepoint terminal) and centrally shall be possible. INTERFACE WITH OTHER SERVICES General DECT must be able to interface to all public and private telecommunications networks, both for voice and non-voice, for which a European or International Standard exists. Edition of July 10, 199%-
