wireless network zxpcs technical specifications_20050608

Table of Contents 1 System Overview ....................................................................................................................1

1.1 Brief introduction to the system....................................................................................1 1.2 System architecture.......................................................................................................1 1.3 System features .............................................................................................................4 1.4 Conditions requirements of the system.........................................................................4

1.4.1 Requirements for equipment room environment .........................................4 1.4.2 Requirements for equipment room safety....................................................5 1.4.3 Requirements for outdoor conditions ..........................................................5 1.4.4 Grounding requirements ..............................................................................5 1.4.5 Requirements on the clock ..........................................................................5

2 System Interface and Indexes................................................................................................7 2.1 System interface............................................................................................................7

2.1.1 Interface between ZXPCS and PSTN/ISDN ...............................................7 2.1.2 Interface between IGW and ICSC ...............................................................7 2.1.3 Interface between IGW and HLR................................................................7 2.1.4 Interface between IGW and OMC...............................................................8 2.1.5 Interface between IGW and billing center...................................................8 2.1.6 Interface between IGW and remote NM terminal .......................................8 2.1.7 ICSC and CSC/RCSC/SCSC.......................................................................8 2.1.8 CS and CSC/RCSC/SCSC...........................................................................8

2.2 System indexes .............................................................................................................8 2.2.1 Switching performance indexes...................................................................8 2.2.2 HLR/AUC indexes ......................................................................................9 2.2.3 ICSC/RCSC/SCSC/CSC indexes ................................................................9 2.2.4 CS28B indexes ..........................................................................................11 2.2.5 Billing unit indexes....................................................................................13 2.2.6 OMC-S indexes .........................................................................................13 2.2.7 OMC-R indexes.........................................................................................13 2.2.8 Transmission indexes ................................................................................13 2.2.9 Synchronization indexes............................................................................13

3 Service Introduction.............................................................................................................14 3.1 Basic services..............................................................................................................14 3.2 Supplementary service ................................................................................................14 3.3 Value added service ....................................................................................................15

4 System Hardware Structure and Technical Index ............................................................17 4.1 IGW hardware structure..............................................................................................17

4.1.1 Functional structure ...................................................................................17 4.1.2 Rack configuration ....................................................................................18

4.2 HLR/AUC hardware structure ....................................................................................18 4.2.1 Functional structure ...................................................................................18

4.3 CSC/RCSC hardware structure...................................................................................20 4.3.1 Functional structure ...................................................................................20

Wireless Network ZXPCS Technical Specifications 4.4 CS hardware structure.................................................................................................21

5 Networking Mode.................................................................................................................23 5.1 Medium and small-capacity networking.....................................................................23 5.2 Large-capacity networking .........................................................................................23 5.3 Expansion mode..........................................................................................................24

6 Appendix Abbreviations ......................................................................................................25

ZTE Confidential Proprietary 1

1 SYSTEM OVERVIEW

1.1 Brief introduction to the system ZXPCS (Personal Communication System) is a new generation of communication product developed with PHS (Personal Handyphone System) technology, which enables more and more people to communicate anywhere and anytime, and provides voice and data communication services.

ZXPCS can tap the potential of the existing network resources, and provide mobile terminal service and a variety of VASs by accessing, via SS7/E1 interface, the exchanges running in PSTN. • The services provided and supported by ZXPCS include:

Voice service Emergency call service

• Special services (caller number display, call forwarding on busy, call forwarding on no reply, and call forwarding unconditional)

1.2 System architecture The system architecture of ZXPCS is shown in the following diagram:

Wireless Network ZXPCS Technical Specifications


Fig. 1-1 ZXPCS architecture

Where:

ICSC Integrated Cell Station Controller

CS Cell Station

CSC Cell Station Controller

RCSC Remote Cell Station Controller

SCSC Smart Cell Station Controller

HLR Home Location Register

IGW Interconnected Gateway

OMC-R Operations Maintenance Centre Radio Access Part

ZXPCS is made up of the service control part and wireless access part. The former mainly includes Home Location Register (HLR), PCS Interconnected Gateway (IGW) and Operations Maintenance Center Service control Part (OMC-S), while the latter mainly includes Integrated cell station controller (ICSC), Cell Station Controller (CSC/RCSC/SCSC) and Operations Maintenance Center Radio Access Part (OMC-R).

The functions of the ZXPCS components are described below:

1. IGW

The main functions of IGW in the system are as follows: support voice channel management, voice channel connection and mobility management, local database management, and provide the centralized monitoring channel for the management platforms of operations maintenance at the same time. The main functions are as follows: • Support voice channel allocation • Support the connection of message paths between various ICSCs • Control the roaming handover of the subscriber among various ICSCs



• Provide a uniform service control platform for the network • Provide interfaces for the service providing part • High scalability as a result of the modular structure

2. HLR

HLR keeps the information of all mobile subscribers in the network, including their identities, location area and class of service.

3. ICSC

ICSC is connected to the central switching unit via an internal interface, enabling the subscriber to control the incoming/outgoing calls of the speech communication via the local network, and provide line concentration control function as well.

The signal output from the local exchange undergoes digital multiplexing and protocol processing at ICSC, and then it is transmitted to CSC/RCSC via optical fiber, microwave or copper cable links. CSC/RCSC and ICSC can be connected via optical fiber, or via the High-Speed Digital Subscriber Line (HDSL) devices and paired copper cables, for transmitting signals to the subscribers far away.

IGW and ICSC can be connected with an internal interface. ICSC and CSC/RCSC/SCSC are connected with an E1 interface in between. ICSC and the local exchange can be installed in the same place. In addition to the interface function, the single module ICSC also provides a centralized user database, mobility management function and line concentration control function. In the system networking with multi-module ICSC, IGW should be set to implement the centralized control and management of multiple ICSCs.

Multiple CSC/RCSCs and cell stations are connected via ICSC, forming a network to cover certain areas. Each single module ICSC can connect up to 50CSC or 16 RCSCs or 100 SCSCs.

The main functions of ICSC are summarized as follows: • Provide the interface with CSC/RCSC/SCSC (base station interface unit); • Provide the interface with the switching network (network interface unit); • Store local subscriber information (subscriber data unit); • Control the roaming registration and handover of the subscriber among

CSC/RCSC/SCSCs (call control and processing unit); • Integrate wired access and radio access; • Support operations maintenance function for network devices (administration and

maintenance unit); • Forward messages between the CS and database • Manage roaming subscribers in the presence of multiple modules

4. CSC/RCSC/SCSC

CSC/RCSC/SCSC is connected with ICSC in E1 mode. The CSC/RCSC/SCSC can control CS, convert signals, allocates voice and signaling timeslots.

CSC/RCSC/SCSC supports the line concentration processing of the voice path, implements roaming handover among various local CSs, and implements dynamic frequency allocation and channel allocation for a number of CSs at the same time.



CS is connected to CSC/RCSC via ISDN 2B+D mode, while CSC/RCSC/SCSC sends the Q.931 signaling call of CS into IGW via ICSC, and broadcasts the IGW signaling to the corresponding CS for processing. In addition, CSC/RCSC/SCSC provides the CS operation and maintenance channel, including the data/program loading process, CS status transmission, etc. CSC/RCSC/SCSC functions are as follows: • Support the call access control of CS • Provide the remote loading channel from the OMC to CS, and support OMC to

control and query remote CSs • Request the authentication key triple from the database, for user authentication

process • Register PS locations • Support PS handover among various CSs in one PA (PAGING AREA), and support

the PS roaming and handover among various CSs in different PAs.

1.3 System features Support internetworking and interconnection between networks and inside a network via the open standard interfaces; • High system capacity and performance, making expansion convenient; • Various VASs can be conveniently introduced via the sophisticated switching

platform; • The system features high stability and reliability, while the network is made highly

stable by means of the mature switch technology; • Flexible implementation of networking and project construction; • Clear NM structure, powerful functions, safe and reliable, easy to user.

1.4 Conditions requirements of the system

1.4.1 Requirements for equipment room environment The equipment room of the ZXPCS should conform to the Communication Equipment Room Environment Conditions, a publication of the Ministry of Information Industry (MII) of China.

IGW, HLR, ICSC:

Temperature: 15°C~30°C

Relative humidity: 40%~65%

CSC/RCSC:

Temperature: 0°C ~40°C


Cleanness: the content of dust with diameter over 5µm should be ≤3×104 particle/sq. Meter, while the dust should be non-conductive, non-magnetic and non-corrosive.



Electromagnetic interference: field strength ≤ 140µV/M, frequency range: 0.01MHz~110000MHz

As the equipment may malfunction against temperatures too low/high in the environment, the equipment should usually be installed air-conditioners to maintain the room temperature within a suitable range.

1.4.2 Requirements for equipment room safety There must be handy fire-fighting equipment in the equipment room.

Sockets of different voltages in the equipment room should be labeled clearly.

No explosives and inflammables in the equipment room.

1.4.3 Requirements for outdoor conditions • The equipment room should not be exposed to strong electromagnetic radiation, lest

the signal transmission should be affected. • The equipment room should be located in places not vulnerable to damages caused

by natural disasters. • The equipment room should be far away from animal inhabits, lest the foundation

should be damaged, causing equipment damage and human injuries.

1.4.4 Grounding requirements Satisfactory grounding of the communication equipment can maintain the normal running of the equipment and protect it against lightning stroke. According the stipulations in General Technical Specification of Telephone Switching Equipment of MII, there should be three separate grounding wires, i.e., AC distribution safety ground, working ground and the lightning-proof grounding wire for main distribution frame. The ground resistance requirements are as follows:

The ground resistance of AC working ground: no more than 4Ω

The ground resistance of AC working ground: no more than 1Ω

The ground resistance of lightning protection ground: no more than 10Ω

The ground resistance in general grounding and combined grounding: no more than 5Ω

1.4.5 Requirements on the clock The normal performance of the system requires that the clock of ZXPCS should be stratum 2 node clock, and in compliance with ITU-G.800, G.801 and G.802 standards.

The synchronization signal provided to ZXPCS can be BITS clock signal, and it can be transmitted via E1 trunk signal.

The provided BITS can either be 2048kbit/s, or 2048kHz.The line pairs connected should be coaxial cable pairs.

For the SDH transmission equipment used in the system, the synchronization mode should be external reference signal timing mode, and BITS should be introduced to serve as the external reference signal. The transmission node without BITS should be synchronized to BITS in the STM- N line signal timing mode, rather than the internal timing source. If any



part of the transmission equipment fails to receive the clock reference sent from BITS, it means that the performance of the entire ZXPCS may be easily disturbed.


2 SYSTEM INTERFACE AND INDEXES

2.1 System interface Configuration standard specification for the ZXPCS Personal Wireless Communications System Interface See the following diagram

Fig. 2-1 Diagram of system interface

2.1.1 Interface between ZXPCS and PSTN/ISDN SS7 connection is provided.

2.1.2 Interface between IGW and ICSC It is the internal interface, 2Mb/s digital interface, in compliance with 2048kb/s Interface Requirements.

2.1.3 Interface between IGW and HLR It is the 2Mb/s digital interface, in compliance with 2048kb/s Interface Requirements.



2.1.4 Interface between IGW and OMC The internal interface.

2.1.5 Interface between IGW and billing center X.25/DDN/PSTN/E1 communication mode is provided.

FTAM protocol //FTP protocol supported.

2.1.6 Interface between IGW and remote NM terminal X.25/DDN communication mode supported.

2.1.7 ICSC and CSC/RCSC/SCSC Connected with E1 interface.

2.1.8 CS and CSC/RCSC/SCSC Connected with U interface (2B+D).

2.2 System indexes

2.2.1 Switching performance indexes System capacity: 600,000

Quantity of subscribers: 600,000

Quantity of trunks: 76,800

Traffic: 27,000Erl

Call processing capability: 2,700k BHCA

Inter-exchange trunk reference load

Reference load A: 0.7Erl/line

Busy hour call attempts: 42/busy hour/incoming circuit

Reference load B: 0.85Erl/line

Busy hour call attempts: 57/busy hour/incoming circuit

PS reference load

Reference load: 0.045Erl/subscriber

Average call duration: 55s/call

Location updating: 3/subscriber/busy hour

Handover: 3/subscriber/busy hour

Authentication: 6/subscriber/busy hour

Dimension: External dimensions of the cabinet conform to the international standard, that is, 2200mm×810mm×600mm (height × width × thickness). The width will be 870mm with side panels added. and the height will be 2000mm without the top cover.



Weight: 250kg under full configuration.

2.2.2 HLR/AUC indexes System capacity: 600,000 subscribers

Reference load:

Call processing: 3 times of processing/subscriber on busy

Mobility management: 3 times of processing/subscriber on busy

Authentication: 6 times of processing/subscriber on busy

Message loss probability: P≤10-7

Information retrieval delay: ≤1000ms (probability 95%)

Registration delay: 2000ms (probability 95%)

Dimension： 2000mm*810mm*600mm (height*width*depth) (A cap needs to be added when the upper wiring mode is used, and the height will be 2200mm, and the width is 870mm with side plates attached)

Weight：less than 250kg in full configuration.

2.2.3 ICSC/RCSC/SCSC/CSC indexes

2.2.3.1 ICSC Performance and Environment Indexes

System capacity: 3000 wireless channels

Operating voltage: DC -57V~-40V

Grounding resistance: <1 ohm.

Power consumption: <1500W

Temperature range

1) Long-term working condition: 15ºC~25ºC

2) Short-term working condition: 0ºC~45ºC

Humidity range

1) Long-term working condition:30%~65%

2) Short-term working condition: 10%~90%

Dimension: 2000mm×810mm×600mm (Height × width × thickness) (A top cover is needed when employing the upward wiring mode, hence increasing the height to 2200mm. The width is 870mm with a side board)

Weight: 250kg with full configuration

2.2.3.2 RCSC Performance and Environment Indexes

System capacity: 64 CSs (1C3T) /Local RCSC or 48CSs (1C3T) /Remote RCSC



Operating voltage: DC -57V-40V



Operating temperature: 15°C~30°C


Dimension：

Remote RCSC cabinet: 2000mm × 600mm × 650mm (Height × width × depth)

Local RCSC cabinet: 2000mm×810mm×600mm (Height × width × thickness) (A top cover is needed when employing the upward wiring mode, hence increasing the height to 2200mm. The width is 870mm with a side board)

Weight

Remote RCSC cabinet: About 180kg

Local RCSC cabinet: About 250kg

2.2.3.3 SCSC Performance and Environment Indexes

System capacity: 8 CSs (1C3T) or 4CSs (1C7T) /SCSC

Operating voltage: AC 100 ~240 V



Operating temperature ：

Long-term working condition: 15ºC~25ºC

Short-term working condition: -5ºC~40ºC

Relative humidity：

Long-term working condition:30%~65%

Short-term working condition: 10%~85%

Height: 2U

Width: 19 inch

Depth: 420mm

Weight: 9.8kg

2.2.3.4 CSC Performance and Environment Indexes

System capacity: 20 CSs (1C3T).

Operating voltage: DC -57V~-40V




Power consumption: about 300W of each shelf layer (depending on the quantity and type of CS)

Temperature range

1) Long-term working condition: 15ºC~25ºC

2) Short-term working condition: 0ºC~45ºC

Humidity range

1) Long-term working condition:30%~65%

2) Short-term working condition: 10%~90%

Dimension：At full configuration, the CSC big cabinet can be installed with 5 CSC plug-in boxes, The external dimension of the 6U standard plug-in box: 266.5 mm × 482 mm × 318.5 mm (height × width × depth).

2.2.4 CS28B indexes

General characters of the CS28B have been show in the following Table:

Item Specification Remarks

Working frequency 1895 MHz ~ 1920 MHz

The actual frequency in use shall be in accordance with the local regulations

Duplex mode TDD/TDMA Number of radio channels

1C7T

Modulation π/4 DQPSK Transceiving mode Adaptive array Number of antenna ports

8 N-J connector

Antenna resistance 50 Ω Output power 500 mW

The environment indices of the CS28B are given in follow Table:

Item Specification

Installation environment

Outdoor

Temperature -30ºC ~ 60ºC RH 10 ~ 90% (25ºC) Waterproof design IP55

Anti-lightning ± 6kV (power-to-ground) ± 4kV (between power cables and between U interface cables)

ESD protection ± 6 kV (contact discharge) ± 8 kV (air discharge)



EMI standard EN 55022 Class B

The transmission performance indices of the CS28B are given in follow Table:

Item Specification Stipulations of the Corresponding RCR STD-28

Carrier frequency stability -3 ~ +3 ppm -3 ~ +3 ppm Spurious emission: Inband Outband

≤ 250 nW ≤ 2.5 µW

≤ 250 nW ≤ 2.5 µW

Occupied bandwidth ≤ 288 kHz ≤ 288 kHz Antenna power deviation 125mW: +20% ~

-50% Normal deviation: +20% ~ -50%

Carrier leakage ≤ 80 nW ≤ 80 nW Transient response feature of transmission Time feature Upper limit of transient powerLower limit of transient power

≤ 13 µs Average power: 4 dB Average power: -14 dB

≤ 13 µs Average power: 4 dB Average power: -14 dB

Modulation precision ≤ 12.5% ≤ 12.5% Adjacent channel power: ± 600 kHz ± 900 kHz

≤ 800 nW ≤ 250 nW

≤ 800 nW ≤ 250 nW

Signal transmission speed ≤ ±5 ppm ≤ ±5 ppm Radiation ≤ 2.5 µW ≤ 2.5 µW

Following table shows the receiving performance indices of the CS28B:

Item Specification Stipulations of the Corresponding RCR STD-28

Receiving sensitivity 0 dBµV (Typical) [Note](4 groups of adaptive arrays)

≤ 16 dBµV

Adjacent channel selectivity

≥ 50 dB ≥ 50 dB

Intermodulation feature ≥ 47 dB ≥ 47 dB Spurious response suppression

≥ 47 dB ≥ 47 dB

Conducted spurious emission

≤ 4 nW ≤ 4 nW

Dimensions: 213 mm (H) × 424 mm (W) × 464 mm (D), excluding the protruded part.

Weight: About 25 kg.



2.2.5 Billing unit indexes Number of days in which IGW can buffer tickets: 5 days (calculated assuming there are 10 modules and 3G harddisk space in each module)

Number of days in which billing unit can buffer tickets: 5 days (calculated assuming there is a 30G harddisk space)

Number of DDN links for transmitting billing data: 1~2 2M links needed

2.2.6 OMC-S indexes • Number of manageable NEs: 255 • Number of manageable OMCs: 40 • Number of days for which performance statistic data can be buffered: over 100 days

2.2.7 OMC-R indexes • Number of manageable ICSCs: 20 • Number of manageable CSs: 19200 • Number of manageable terminals: 20

2.2.8 Transmission indexes Error performance: the long-term average BER is better than 110-9.

Bit sequence independence: in 64kb/s channel, no restriction is imposed on the number of continuous binary “1s” or “0s” or any other binary code patterns transmitted.

Absolute group delay:

Average: 900µs

The value not to be exceeded at 95% probability: 1500µs

2.2.9 Synchronization indexes • Synchronous clock: Clock of stratum 2 class A • Minimum clock precision: ±4x10-7 • Pull-in range: ±4x10-7 • Maximum frequency deviation: 10-9/day • Maximum initial frequency deviation: 5x10-10

• Clock working mode: Fast capture, locked, hold-over and free-run • Requirements on clock synchronization link interface: • Jitter and wander of input-end signal: ≥1.5UI, 20~ 2400Hz • Jitter and wander of output-end signal: ≤1.5UI, 20~10000Hz • ≤0.2UI, 18000~100000Hz • 1UI=488ns


3 SERVICE INTRODUCTION

3.1 Basic services ZXPCS system support voice service, emergent call service etc. present tele-network could provide.

3.2 Supplementary service The following supplementary services can be implemented:

3.2.1 Outgoing call barring

The subscriber can restrict the following categories of outgoing calls of the phone set by setting certain dialing procedures:

Restrict all outgoing calls, including the local calls.

Restrict the international and domestic toll automatic calls, but do not restrict local calls.

Restrict the international toll automatic calls only.

Incoming calls will not be restricted at all on the phone set that is registered with outgoing call barring.

3.2.2 Do not disturb service

This service can be used when the subscriber expects not to be disturbed by any incoming call within a certain period. If the subscriber applies for this service, all incoming calls will be rejected, and the caller will be prompted by “Don’t disturb, please. Thanks!”. Meanwhile the outgoing calls of the subscriber will not be restricted.

3.2.3 Malicious call tracing

When the subscriber applies to the operator for malicious call tracing service, malicious calls will be traced and the number of the malicious caller will be found out by the operator through corresponding operations.

3.2.4 Interception service

When the subscriber encounters an idle number, a modified number, or temporary blocking of the route, etc., the exchange will automatically connect the subscriber to the recording answer-agent device. It is a free service provided by the operator, without any formality of registration or operation by the subscriber.

3.2.5 CFU (Call Forwarding Unconditional)



When this service is used, all calls to this subscriber number, regardless of the status of the called, will be automatically forwarded to a number specified in advance.

3.2.6 CFNR (Call Forwarding No Reply)

When the subscriber is registered with “CFNR”, all incoming calls to this subscriber will be automatically forwarded to one or several numbers specified in advance if there is no reply in the specified period.

3.2.7 CFB (Call Forwarding Busy)

When this service is used, all incoming calls to this subscriber will be automatically forwarded to another designated number (including the voice mailbox) when busy.

3.2.8 Absent subscriber service

If there is an incoming call when the subscriber is absent, the caller will be prompted by “Sorry! The subscriber you are calling is absent. Please call later.”.

3.2.9 Caller number display

ZXPCS supports this function, and it will be available upon application to the telecommunication service provider.

3.2.10 Caller number display barring

The caller number, if not expected to be seen at the called terminal, can be concealed in the display.

When applying for this service, the subscriber must specify his/her category. The subscriber of category A has the authority to request to restrict the number display through certain operations when originating a call, while the number is usually not concealed to the called. The subscriber of category B has the authority to request to display the number through certain operations when originating a call, while the number is usually concealed to the called. The subscriber number of category C will be permanently concealed to the called.

3.2.11 Unreachable call forwarding

Unreachable call forwarding is to re-connect a call according to the forwarding number pre-set by the subscriber, when it is timeout no response to a paging originated to the called. Paging without response usually occurs when the subscriber is out of the service area, the CS control channel is busy, etc.

3.3 Value added service

3.3.1 Virtual HLR Function

For meet different district administration, HLR could realize corresponding management function. Namely, one HLR entity physically could provide virtual multi-HLR logically, thus business console in different district only operate itself handset number segment.

3.3.2 Zone Restricted Service



Through this service, the system could permit user ingoing and outgoing in specified zone.

3.3.3 Mobile handset located Service

Uni-number the base station, every base station have a corresponding CSID, ICSC report the CSID of every user located in, and store it in HLR. Thus the system could located the user, the located area is from 50m~500m.

3.3.4 Wireless CENTREX Service

To corporation, school, government etc. group users, the system could set the whole group as a CENTREX. If call occur in the same CENTREX, the flexible billing strategy could be adopted. In fact, CENTREX service is easy for develop large group users.

3.3.5 IN Service

PPS (Pre-Paid Service): This is a typical service of “pay first, serviced next ”. When a subscriber applies for this service, the network operator will give him a unique account number corresponding with his subscriber number. All the call charges of a PPS subscriber will be deducted from his account. Once his balance is not enough or his account expires, the network will reject to provide services for him until he recharges his account. With this service, you can set the maximum sum spent in a day or a month to ensure the economic interests of the service subscriber.

PPS can provide the real-time control mechanism and charging function by means of the mobile IN to ensure the interest of the network operators through controlling the arrears of subscribers and malicious overdraft, to reduce operation risk of telecommunication carriers. Meanwhile, it brings profit for the operators from the sufficient call charge accumulation. With a reasonable charging policy, an operator will be able to attract more service subscribers and enhance the network utilization together with the increased revenues and early recovery of network investment.

3.3.6 Short Message Service

With the short message service, it provides the system with a series of extended service functions, including E-mail notice, short messages via the Internet, E-mail from a mobile station, fees-due notice, and automatic integrated service information station, etc.

3.3.7 Data Service

Besides, ZTE could provide data service such as 32Kbps PIAFS or 64Kbps PIAFS transmission, it could be used for internet access, fax etc.


4 SYSTEM HARDWARE STRUCTURE AND TECHNICAL INDEX

4.1 IGW hardware structure

4.1.1 Functional structure Comprising CSM (the central module) and MPM (the peripheral module), the IGW system structure is shown below:

Fig. 4-1 IGW system structure

Functions of IGW modules are described below:

1. Mobile Peripheral Module (MPM)

MPM is a basic independent module in IGW, used to implement voice channel connection and signaling processing between intra-module subscribers, and connect the signaling and voice channel between intra-module subscribers and other MPM module subscribers to the switching network module in the SNM center.

2. Center Switching Module (CSM)


CSM consists of MSM and SNM, and is mainly used for message switching and voice channel switching between modules.

3. Message Switching Module (MSM)

MSM is mainly used for message switching between modules. MPM is connected to SNM via optical fiber with its communication time slot connected to MSM through the semi-fixed connection of SNM, and MP in MSM implements message switching based on the routing information.

4. Switching Network Module (SNM)

SNM, the core module in the multi-module exchange system, is mainly used for voice channel switching between modules in the multi-module system and sending the communication time slots from the multiple modules to MSM through semi-fixed connection.

5. Operation & Maintenance Module (OMM)

OMM is used to manage the switching entities of IGW, including the three parts of system analysis, system maintenance and signaling maintenance. Its functions include the followings: authority management, data configuration, billing management, performance statistics, fault management, diagnosis test, subscriber tracing, signaling tracing, version management, file management, voice loading, service observation, clock management, and database management.

4.1.2 Rack configuration In the CSM module, the large-capacity (64k * 64k) NET board is used to form the plane of the switching network. This plane features low congestion rate, high reliability, fulfilling the communication exchange between peripheral modules. The peripheral module MPM uses the 64k * 64k NET board to form the plane of the switching network and connect ICSC, while accomplishing the connection to PSTN and to other directions.

4.2 HLR/AUC hardware structure

4.2.1 Functional structure The HLR/AUC system mainly consists of the common channel signaling processing part, database part, service processor part and operations/maintenance part. These parts are connected with the HUB through the Ethernet and they communicate with each other via TCP/IP to process the subscriber data. The dual-network connection is employed to ensure the reliability. The system architecture of HLR/AUC is shown below:



Fig 4-2 The system architecture of the ZXPCS-HLR/AUC

The function and structure of respective unit are described briefly as follows:

Common channel signaling processing unit

Comprising one or more CPMs, the common channel signaling processing unit is mainly engaged in No.7 signaling processing, meanwhile it serves as the interface between HLR/AUC and other functional entities. A CPM provides 48 No.7 links and the number of CPMs may be configured if needed.

Service processing unit

The service processing unit works in the multi-module load-sharing mode and it comprises one or more service processing modules (HSMs), which may be configured as required. Multiple HSMs execute the service processing in parallel and are redundant backups for each other: so if any HSM breaks down, other HSMs will share the task evenly.

Using the high-performance processor, HSM mainly processes the mobile management services, meanwhile it visits the database unit in real time and performs signaling interaction with other functional entities via CPM.

Database unit

The database unit is made up of one or more data modules (HDMs). This unit adopts the distributed storage mode to divide the subscriber data into different sections according to the range of the data, and different sections are stored in different HDMs.

An HDM is made up of, in terms of hardware, two servers and one disk array. The Cluster technique is employed to enhance the system reliability and its data are stored in the RAID mode.

It runs Windows NT operating system (for enterprises) and Microsoft SQL Server database.

Operations & maintenance unit



The operations & maintenance unit consists of the operations & maintenance server (OMM Server), and the handling console and maintenance console that’s connected with the OMM Server. Both the handling console and maintenance console providie man-machine operation platform. An operator can, with the maintenance console, keep track of the running conditions of the HLR/AUC system, and detect and clear faults, and manage subscribers through the handling console. Furthermore, the remote service handling and operations/maintenance can be handled via the router.

4.3 CSC/RCSC hardware structure

4.3.1 Functional structure CSC/RCSC controls CS, converts the signaling, and allocates voices and signaling timeslots. CSC/RCSC extracts the synchronization clock from the PCM digital link, and sends the synchronization clock to CS, thus realizing CS synchronization. CSC/RCSC is connected with CS through the U interface. The subscriber line board may use CSI board and CSMC board (supporting ZTE CS only) to connect to various CSs. A CSI board can provide 8 U interfaces without remote feeding. And a CSC can provide up to 40 U interfaces. RCSC can provide up to 96 U interfaces.

CSC can provide 4 channels of HDLC links when connecting to ICSC via the E1 interface. It may also connect to the transmission system via 2×2Mb/s, then to ICSC via the transmission system, in this case it can be placed near the CS as the remote control unit, thus enhancing the system networking flexibility. If ICSC is connected with CSC via SDH, the TPI board is used to reduce jitter.

RCSC adopts SP host-standby board as main control board. It completes the control to CSI and CSMS. SP contects DTI by cable then DTI contects to transmission and transmission connects to ICSC. CKG boards provide synchronization for RCSC. Its input signal is 2 LVDS 8Khz synchronization signal provided by DTI board. And also can be connected with GPS to provide 1s synchronization signal.

The main functions of CSC /RCSC are: • Provide the interface for multiple CSs, and controlling CS. • Assign voices and signaling timeslots, connect to LC network, meanwhile assign

channels for multiple CSs. • Monitor the status of the CSI, CSMC boards and the U interface, and reporting to

ICSC. • Convert the ISDN signaling from CS into the internal signaling and sending it to

ICSC. • Convert the internal signaling from ICSC into the ISDN signaling and sending it to

CS. • On the basis of protocol conversion, carry out the flows of incoming call, outgoing

call and handover as a supporting unit. • Request the authentication key triple to implement user authentication control. • Provid the remote loading channel from the OMC to CS, and support OMC to

control and query remote CSs.

The functional structure of CSC is shown in the following diagram:



Fig 4-3 The Block diagram of CSC functional structure

4.4 CS hardware structure

The hardware structure of the CS28B cell station is shown in following Figure.

Fig 4-4 Functional Modules of the CS28B

Following is a description of the functional modules of the CS28B



1. RF interfaces

The RF interface part is composed of the transceiver to implement the transceiving function of radio signals. The interface indices comply with the RCR STD-28 V3.3 standard.

2. Radio signal processing and radio control

The radio signal processing and radio control part completes the TDMA/TDD processing of baseband signals and uses the intelligent algorithms to modulate and demodulate signals.

3. Central control

The central control part provides the functions of system control, call connection and operation &maintenance.

4. Line interfaces

The line interface part is connected to the CSC or RCSC via the U interface line. Its physical layer interface specifications comply with ANSI T1.601-1992.

5. Power supply module

The power supply part generates stable DC voltage to ensure the normal running of the CS28B.It is connected externally to the 220V mains supply.

The ZXPCS CS28B has the following features:

1. Large transmitting power and high receiving sensitivity.

2. Using adaptive array antenna technology.

3. Multi-channel capability. A single CS provides 1C7T and the bundled CSs support 1C15T, 1C23T or 1C31T, depending on how much CSs are bundled.

4. Supporting the use of a single CS or the main CS in the case of bundled CSs as a GPS CS.

5. Using the RF interfaces in compliance with the RCR STD-28 V3.3 standard.

6. Using the U interface in compliance with the ITU-T G.961 and ANSI T1.601 (1999) standards.

7. Showing the line status via LED indicators.

8. Using the RS-232C interface for local maintenance.

9. Advanced EMC features.

10. Reliable waterproof design.


5 NETWORKING MODE

5.1 Medium and small-capacity networking See Fig. 6-1 for the networking mode.

Fig. 6-1 Networking mode of medium and small-capacity exchanges

This networking mode applies to small and medium exchanges, accommodating 60,000

subscribers. It involves one IGW processing module (MPM) and an MPM can process 60.000 subscriber.

5.2 Large-capacity networking See Figure 6-2 for the networking mode.

Fig. 6-2 Networking mode of the large-capacity exchange

Note: SDH is an optional configuration and not included in this system.

MPM

IGW PSTN

ICSCICSC ...

... ...

MPM

IGW CSM

ICSC ...

... ...

ICSC

...MPM

...

... ...

ICSC ICSC



This networking mode applies to large exchange, accommodating 600,000 subscribers. It involves the CSM and 1~10 peripheral IGW modules (MPMs), each MPM supporting up to 60,000 subscribers, and provides the interface to the public and private networks and ICSC. MPM and CSM are connected using the optical fiber.

5.3 Expansion mode ZXPCS can be expanded linearly without frequency planning needed. Besides, the convenient expansion can fully protect the original investment of the user. Usually it is built phase by phase. In phase 1, a network of wide coverage is built in IGW mode, as the roaming area has to be large enough to attract adequate subscribers, thus lowering the cost of early-stage construction. Then the network can be expanded along with the rise of network subscribers and network traffic. The IGW of ZXPCS can support up to 10 MPMs, each configured with 6 ICSCs, while The number of MPMs and ICSCs can be added along with the growth of subscribers, thus expanding the capacity.


6 APPENDIX ABBREVIATIONS Abbreviation Full name

ACK ACKnowledgement

ACM Accumulated Call Meter

ACM Address Complete Message

AE Application Entity

ASE Application Service Element

ASN.1 Abstract Syntax Notation One

ASS Absent Subsciber Service

AUC Authentication Centre

ASLC Analog Subscriber Line Circuit

ASIC Analog Single

BCP Basic Call Process

BCM Basic Call Management

BCSM Basic Call State Model

B-ISDN Broadband ISDN

BAIC Barring of All Incoming Calls supplementary service

BAOC Barring of All Outgoing Calls supplementary service

BCTL Back Control

BDT Back Digital Trunk

BHCA Busy Hour Calling Attemp

BNET Back Network

BO All Barring of Outgoing call supplementary services

BOIC Barring of Outgoing International Calls supplementary service

BS Basic Service (group)

BS Bearer Service

BSG Basic Service Group

CAMEL Customized Applications for Mobile Networks Enhanced Logic

CAP CAMEL Application Part

CCAF Call Control Function

CAI Charge Advice Information

CC Country Code

CC Call Control

CCF Conditional Call Forwarding



CCITT The International Telegraph and Telephone Consultative Committee

Cct Circuit

CF All Call Forwarding services

CFB Call Forwarding on mobile subscriber Busy supplementary service

CFNRc Call Forwarding on mobile subscriber Not Reachable supplementary service

CFNRy Call Forwarding on No Reply supplementary service

CFU Call Forwarding Unconditional supplementary service

CI CUG Index

CIC Circuit Identification Code

CID Call Instance Data

CKDR Clock Driver

CKI Clock Input

CLI Calling Line Identity

CLIP Calling Line Identification Presentation supplementary service

CLIR Calling Line Identification Restriction supplementary service

CM Connection Management

CMD CoMmanD

COLI COnnected Line Identity

COLP COnnected Line identification Presentation supplementary service

COLR COnnected Line identification Restriction supplementary service

COMM COMMunication

CONNACK CONNect ACKnowledgement

CP Core Processor

CPM Common signaling Process Module

CRC Cyclic Redundancy Check (3 bit)

CS Cell Station

CS1,2 Capability Set 1,2

CSC/RCSC/SCSC Cell Station Controller

CSI CAMEL Subscription Information

CSL Component Sub-layer

CSM Central Switch Module

CSPDN Circuit Switched Public Data Network

CUG Closed User Group supplementary service

CW Call Waiting supplementary service

DB Data Base

DET DETach

DFP Distribution Function Plane

DISC DISConnect

DL Data Link (layer)

DSN Digital Trunk Network

DSNI Digital Trunk Network Interface

DTAP Direct Transfer Application Part

DTMF Double Tone and Multiple Frequency



DTI Digital Trunk Interface

DP Detection Point

DPC Destination Point Code

DSLC Digital Subscribe Line Circuit

EC Echo Canceller

EPROM Erasable Programmable Read Only Memory

ETS European Telecommunication Standard

ETSI European Telecommunications Standards Institute

FBI Fiber Bus Interface

FIM Feature Interaction Management

FE Function Entity

FEAM Function Entity Access Management

FTN Forwarded-to number

GFP General Function Plane

GIGW Gate Interconnected GateWay

GPS Global Position System

GSL General Service Logic

GSM Global System for Mobile communications

GT Global Title

HANDO HANDOver

HDLC High level Data Link Control

HLC High Layer Compatibility

HLR Home Location Register

HOLD Call hold supplementary service

HW High-way

IAM Initial Address Messag

IAI Initial Address Message with Information

ID IDentification/IDentity/Identifier

IGW Interconnected GateWay

IN Intelligent Network

INAP IN Application Protocol

INCM IN Conceptual Model

ISM Infinite State Machine

ISUP ISDN User Part

ITU-T International Telecommunication Union

Ki Individual subscriber authentication key

LAN Local Area Network

LCN Local Communication Network

MACF Multiple Association Control Function

MAP Mobile Application Part

MCC Mobile Country Code

MCI Malicious Call Identification

MF Mobile Forwarding



MFC Mobile Forwarding Compel

MM Mobility Management

MMI Man Machine Interface

MO Mobile Originated

MP Module Processor

MPM Mobile Peripheral process Module

MSM Message Switching Module

MSRN Mobile Station Roaming Number

MT Mobile Terminated

MTP Message Transfer Part

NDUB Network Determined User Busy

NE Network Element

NF Network Function

NIC Network Independent Clocking

NM Network Management

NMC Network Management Centre

O&M Operations & Maintenance

OMC Operations & Maintenance Centre

OMM Operate Maintenance Module

OMAP Operation Maintenance Application Part

OPC Origination Point Code

OS Operating System

OSI Open System Interconnection

PA Page Area

PCM Pulse Code Modulate

PCS Personal Communacation System

PEPD Peripheral Environment Parameter Detection

PHS Personal Handyphone System

PIC Point In Call

PLMN Public Land Mobile Network

PP Physical Plane

POI Point of Initiation

POR Point of Return

POWB Power B

PS Personal Station

PSID PS IDentifier

PSPDN Packet Switched Public Data Networ

PSNUM PS NUMber

PSM Peripheral Switching Module

PSTN Public Switched Telephone Network

PW Pass Word

RAND RANDom number (used for authentication)

REJ REJect (ion)



REL RELease

REQ REQuest

SACF Single Association Control Function

SAP Service Access Point

SC Shortmassage Centre (of ZXPCS)

SC Service Code

SCCP Signalling Connection Control Part

SCE Service Creation Environment

SCEF Service Creation Environment Function

SCEP Service Creation Environment Point

SCF Service Control Function

SCP Service Control Point

SDF Service Data Function

SDP Service Data Point

SF Service Feature

SIB Service Independent Building Block

SIU Signaling Interface Unit

SLEE Service Logic Execution Environment

SLEM Service Logic Execution Management

SLP Service Logic Process

SLPI Service Logic Process Instance

SMAP Service Management Access Point

SMAF Service Management Access Function

SMC ShorT Message Center

SME Short Message Entity

SMEM Shared Memory

SMF Service Management Function

SMP Service Management Point

SMS Short Message Service

SMS/PP Short Message Service/Point-to-Point

SN Subscriber Number

SNM Switching Network Module

SPC Signalling Point Code

SS Supplementary Service

SSN Sub-System Number

SS7 Signalling System No. 7

STP Signalling Transfer Point

SYCK Sync Clock

TAF Terminal Adaptation Function

TCAP Transaction Capability Application Part

TE Terminal Equipment

TM Transfer Machine

TMN Telecommunications Management Network



TS Time Slot

TSL Transaction Sub-layer

TUP Telephone User Part

USSD Unstructured Supplementary Service Data

VDB Visitor DateBase

VLR Visitor Location Register

VPM VDB Process Module

VM Voice Mailbox

wireless network zxpcs technical specifications_20050608

Documents