PHS-FWA Technical Specifications Revised


Technical Working Group (WG) of the PHS MoU Group made revisions to the Technical Specifications (TSs) to include ISDN and leased line services in PHS-based Fixed Wireless Access (FWA) system. Said TSs, as shown in Table 1, were released. The revisions correspond to the RCR STD-28 Version 3.3 -- the technical standards for PHS air interface -- which was recently released by the Association of Radio Industries and Businesses (ARIB). The revisions cover all TSs related to PHS-FWA: the general specifications (C-GN), service specifications (C-SV), network specifications (C-NW) and interface specifications (C-IF). These TSs can be purchased from the PHS MoU Group Secretariat (e-mail: phsmou@po.iijnet.or.jp). Highlights of the revisions are as follows:

1. Addition of specifications for ISDN and leased line services, etc.
The previous versions of TSs covered the PHS air interface for applying the outdoor public PHS system to the FWA system only (used mainly for providing analog telephony service). In order to make ISDN and leased-line services available via FWA system, the revised TSs now include a new type of PHS air interface, which establishes a network by using pre-set communications channels.
Fig. 1 shows the PHS-FWA network model as well as an outline of the revisions. For instance, where an ISDN service is of the 2B+D type, two 64 kbit/s communications channels are assigned to two B channels (B1 and B2) and one 32 kbit/s communications channel is assigned to D channel (see Fig. 2).

Fig. 1 PHS-FWA network model and revision summ
Fig. 2 Example of ISDN call set up sequence



2. Alteration of term
The International Telecommunication Union's Radiocommunication Sector (ITU-R) recently released ITU-R Recommendation F.1399, which describes new wireless access terminology adopted by ITU-R. Based on this, the term WLL (Wireless Local Loop) in the TSs was replaced by FWA.

Table List of PHS MoU Technical Specifications for PHS-FWA system

  Document No. Document Title Rev. / New
1 C-GN0.00-03-TS PHS-FWA System: General Description Revised
2 C-SV0.00-02-TS PHS-FWA System : General Description of Services Revised
3 C-SV1.00-02-TS PHS-FWA System : Service of PHS-FWA System Revised
4 C-NW0.00-02-TS PHS-FWA System : General Description of Network and System Configuration Revised
5 C-NW1.00-04-TS PHS-FWA System : System Configuration of PHS-FWA System Revised
6 C-IF0.00-03-TS PHS-FWA System : General Description of Interface Specifications Revised
7 C-IF1.00-02-TS PHS-FWA System : General Description of Interface Specification between Terminal Equipment and Fixed Wireless Access Subscriber Unit Revised
8 C-IF1.01-02-TS PHS-FWA System : Interface Specification between Terminal Equipment and Fixed Wireless Access Subscriber Unit -Analogue Subscriber Interface - Revised
9 C-IF1.02-01-TS PHS-FWA System : Interface Specification between Terminal Equipment and Fixed Wireless Access Subscriber Unit -ISDN Basic Rate Interface - New
10 C-IF2.00-02-TS PHS-FWA System : General Description of Interface Specification between FWA Subscriber Unit or FWA Personal Station and FWA Cell Station (Common Air Interface) Revised
11 C-IF2.01-03-TS PHS-FWA System : Interface Specification between FWA Subscriber Unit or FWA Personal Station and FWA Cell Station (Common Air Interface) Revised
12 C-IF3.00-02-TS PHS-FWA System : General Description of Interface Specification between FWA Access Controller and Service Node Revised
13 C-IF3.01-02-TS PHS-FWA System : Interface Specification between FWA Access Controller and Service Node - Analogue Subscriber Interface - Revised
14 C-IF3.02-02-TS PHS-FWA System : Interface Specification between FWA Access Controller and Service Node - ITU-T G.964: V5.1 Interface - Revised
15 C-IF3.03-02-TS PHS-FWA System : Interface Specification between FWA Access Controller and Service Node - ITU-T G.965: V5.2 Interface - Revised
16 C-IF3.04-02-TS PHS-FWA System : Interface Specification between FWA Access Controller and Service Node -Bellcore GR-303 Interface- Revised
17 C-IF3.05-01-TS PHS-FWA System : Interface Specification between FWA Access Controller and Service Node -ISDN Basic Rate Interface- New