Personal Digital Cellular

Personal Digital Cellular (PDC) was a 2G mobile telecommunications standard used exclusively in Japan .[citation needed]

After a peak of nearly 80 million subscribers to PDC, it had 46 million subscribers in December 2005, and was slowly phased out in favor of 3G technologies like W-CDMA and CDMA2000. At the end of March 2012, the count had dwindled down to almost 200,000 subscribers. NTT Docomo shut down their network, mova, on April 1, 2012 at midnight.[1]

## Contents

* 1 Technical overview
* 1.1 PDC-EFR
* 1.2 PDC-HR
* 2 Operators of PDC service
* 3 Standardization organizations
* 4 See also
* 5 References

## Technical overview

Like D-AMPS and GSM, PDC uses TDMA. The standard was defined by the RCR (later became ARIB) in April 1991, and NTT DoCoMo launched its Digital mova service in March 1993. PDC uses 25 kHz carrier, pi/4-DQPSK modulation with 3-timeslot 11.2 kbit/s (full-rate) or 6-timeslot 5.6 kbit/s (half-rate) voice codecs.

PDC is implemented in the 800 MHz (downlink 810–888 MHz, uplink 893–958 MHz), and 1.5 GHz (downlink 1477–1501 MHz, uplink 1429–1453 MHz) bands. The air interface is defined in RCR STD-27 and the core network MAP by JJ-70.10. NEC, Motorola, and Ericsson are the major network equipment manufacturers.[citation needed]

The services include voice (full and half-rate), supplementary services (call waiting, voice mail, three-way calling, call forwarding, and so on), data service (up to 9.6 kbit/s CSD), and packet-switched wireless data (up to 28.8 kbit/s PDC-P). Voice codecs are PDC-EFR and PDC-HR.

Compared to GSM, PDC's weak broadcast strength allows small, portable phones with light batteries at the expense of substandard voice quality and problems maintaining the connection, particularly in enclosed spaces like elevators.

### PDC-EFR

PDC Enhanced Full Rate is a speech coding standard that was developed by ARIB in Japan and used in PDC mobile networks in Japan. The carriers use one of those codecs as PDC-EFR: CS-ACELP 8 kbit/s (a.k.a. NTT DoCoMo Hypertalk) and ACELP 6.7 kbit/s (a.k.a. J-PHONE Crystal Voice).[2][3]

The PDC-EFR CS-ACELP uses G.729. The PDC-EFR ACELP is compatible with the AMR mode AMR_6.70.

### PDC-HR

PDC Half Rate is a speech coding standard that was developed by ARIB in Japan and used in PDC mobile networks in Japan. It operates with a bit-rate of 3.45 kbit/s and is based on Pitch Synchronous Innovation CELP (PSI-CELP).[4]

## Operators of PDC service

* NTT DoCoMo (mova brand): Service terminated on March 31, 2012
* SoftBank Mobile (SoftBank 6-2 brand): Service terminated on March 31, 2010
* KDDI
* au: Service terminated on March 31, 2003
* TU-KA: Service terminated on March 31, 2008

## Standardization organizations

* Association of Radio Industries and Businesses (ARIB)
* Telecommunication Technology Committee (TTC)

## See also

* AMR
* PDC-FR - VSELP-based old full-rate codec

## References

1. ↑ "DOCOMO to Terminate mova and DoPa 2G Services". 2012. http://www.nttdocomo.com/pr/2009/001428.html.
2. ↑ ARIB RCR STD-27L, Personal Digital Cellular Telecommunication System RCR Standard "5.3 CS-ACELP speech CODEC" and "5.4 ACELP Speech CODEC"
3. ↑ IEICE Knowledge-Base Category 2. Part 8. Chapter 3. The encoding methods for mobiles IEICE
4. ↑ ARIB RCR STD-27L, Personal Digital Cellular Telecommunication System RCR Standard 5.2 Half-rate speech CODEC

* v
* t
* e

Cellular network standards

List of mobile phone generations

0G radio telephones (1946)|

* MTS
* IMTS
* Altai
* OLT
* MTA - MTB - MTC - MTD
* AMTS
* Autotel (PALM)
* ARP
* B-Netz
* AMR

1G (1979)|

| AMPS family|

* AMPS - N-AMPS
* TACS - ETACS

|

Other|

* NMT
* C-450
* Hicap
* Mobitex
* DataTAC

2G (1991)|

| GSM/3GPP family|

* GSM
* CSD - HSCSD

|

3GPP2 family|

* cdmaOne (IS-95)

AMPS family|

* D-AMPS (IS-54 and IS-136)

Other|

* CDPD
* iDEN
* PDC
* PHS

2G transitional
(2.5G, 2.75G)|

| GSM/3GPP family|

* GPRS
* EDGE/EGPRS - Evolved EDGE

|

3GPP2 family|

* CDMA2000 1X (TIA/EIA/IS-2000)
* CDMA2000 1X Advanced

Other|

* WiDEN
* DECT

3G (2001)|

| 3GPP family|

* UMTS
* UTRA-FDD / W-CDMA
* FOMA
* UTRA-TDD LCR / TD-SCDMA
* UTRA-TDD HCR / TD-CDMA

|

3GPP2 family|

* CDMA2000 1xEV-DO Release 0 (TIA/IS-856)

3G transitional
(3.5G, 3.75G, 3.9G)|

| 3GPP family|

* HSPA
* HSDPA
* HSUPA
* HSPA+
* DC-HSDPA
* LTE (E-UTRA)

|

3GPP2 family|

* CDMA2000 1xEV-DO Revision A (TIA/EIA/IS-856-A)
* EV-DO Revision B (TIA/EIA/IS-856-B)
* EV-DO Revision C

IEEE family|

* Mobile WiMAX
* IEEE 802.16e
* Flash-OFDM
* iBurst (IEEE 802.20)
* WiBro

ETSI family|

* HiperMAN

4G (2009)
IMT Advanced (2013)|

| 3GPP family|

* LTE Advanced (E-UTRA)
* LTE Advanced Pro (4.5G Pro/pre-5G/4.9G)

|

IEEE family|

* WiMAX (IEEE 802.16m)
* WiMax 2.1 (LTE-TDD / TD-LTE)
* WiBro

5G (2019)
IMT-2020 (under development)|

| 3GPP family|

* NR
* NR-IIoT
* LTE-M
* NB-IoT

|

Other|

* DECT-5G

Related articles|

* Cellular networks
* Mobile telephony
* History
* Comparison of standards
* Channel access methods
* FDMA
* OFDMA
* TDMA
* STDMA
* SSMA
* CDMA
* SDMA
* Spectral efficiency comparison table
* Frequency bands
* GSM
* UMTS
* PCS
* LTE
* 5G NR
* Mobile broadband
* NGMN Alliance
* Push-to-talk
* MIMO
* VoLTE
* Wi-Fi calling

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