JP3069327B2 - Wired / wireless integrated device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an integrated structure of a wireless communication device and a wired communication device.

[0002]

2. Description of the Related Art New network technologies are being developed for voice and data communication between cities, nations, or between nations.

[0003] Wireless means a broadly defined communication device and communication technology using radio waves. A mobile telephone, a cellular phone, a pager, a PCS (Personal Communication System), and the like are examples of wireless communication devices to which the present invention can be applied.

[0004] The cellular system shown in FIG. 1 has a base station network sufficient for wireless communication within a service area. The base station is connected to a mobile switching center (MSC), which connects to a public switched telephone network (PSTN) to enable wireless terminals to connect to a general line. The PSTN is connected to an existing wired telephone exchange (central office) or another MSC to form a global communication grid.

[0005] The radio terminal uses an inter-signalin-
g) or communicate with the base station over a wireless link formed by a wireless interface that defines a handshaking protocol. The wireless interface defines a method for the wireless terminal and the base station to communicate voice and data in a fixed radio frequency band, and outputs a control signal that enables the wireless terminal and the base station to form a call together.

[0006] The communication between the radio terminal and the base station involves the exchange of signals and tuning data or radio interface areas, and the transmission of voice signals, data information or payload portions.
Including replacement. The radio interface area is discarded at the base station, and the available mounting area is sent to the MSC via a fixed link such as a landline or a microwave link. Each base station has the capability to handle 50 calls simultaneously, and the MSC can connect 100 base stations to the PSTN. Therefore, M
A considerable connection capacity is required between the SC and the PSTN.

PST where all terminals are connected by wire
For N, the wireless communication device is very complicated. Primarily,
In order to provide a service comparable to a wired telephone under various propagation conditions, a complicated interface between a base station and a wireless terminal is required. Also, a large number of base stations are required to cover the entire service area, and each base station is connected to the MSC. In addition, the MSC must guarantee all wireless terminals a connection from the PSTN. Such a connection requires simultaneous connections to the local exchange (LEC) and the long distance or interexchange (IXC).

[0008] Whereas a wired telephone switch can process one million terminals simultaneously, the MSC has a maximum of 100,000 to 2
Only about 000 wireless terminals can be processed simultaneously.

1. First generation wireless systems: First generation wireless systems (analog cellular and cordless telephones) are based on analog technology. The system structure shown in FIG. 2 is a first generation cellular system. The A base station is the first
Communicate with MSC (MSC1). The connection between the MSC and the base station network is called a network (when a large number of networks are connected, a global network is formed). The first MSC
Is the home MSC that performs the outgoing call service in the area A.

[0010] The base stations in the area B constitute a second network and communicate with the second MSC (MAC2). The second MSC is called the visiting MSC because it communicates from the outside to the area A. Each MSC has a Home Location Register (HLR), a Visited Location Register (VL) which will be described in detail below in other functional units.
R) and an access controller (AcC).

The first MSC and the second MSC are connected to the PSTN. The first MSC and the second MSC are connected through a common channel signal link. Signaling system 7 (S
S7) is a widely used signaling protocol for common channel signaling between networks, and is used to connect almost all MSCs in the United States. Automatic registration and automatic roaming with first generation cellular devices
(See IEEE Technical Report, Vol. 80, No. 4, pp. 590-606, April 1992).

[0012] First generation wireless systems provide analog voice transmission and inefficient low-speed data transmission between base stations and wireless terminals. Voice data is digitized using time division multiplexing (TDMA) between the base station and the MSC for transmission between the MSC and the PSTN.

[0013] The global network as an aggregate of each network needs to track mobile terminals throughout the global network, and requires an authorized wireless terminal (authorized).
user) and unauthorized wireless terminals.
To that end, the authorized wireless terminal, when activated, communicates with the base station sending the strongest control channel. While the wireless terminal moves in the same area (moves in the home network), M
The SC tracks the location and status of the wireless terminal and performs handoffs between base stations within the area.

However, when the wireless terminal moves to an area of a different MSC (moves to a visitor network), the global network must register the wireless terminal in the visitor area, and the visitor network registers the wireless terminal with the visitor network. Cancel registration in the home region to route an incoming call. Until the early 1990's, wireless terminals moving to areas served by other service providers had to manually register within the moved visitor area. However, the IS-41 network protocol standard for automatically registering wireless terminals moving to different areas of the service provider has eliminated the hassle. IS-41
Inter operator roami realized by
ng) exchanges wireless terminal information necessary for providing a service to a wireless terminal that has moved from the MSC of another service provider.

IS-41 is an autonomous regis
tration) AMPS (Advanced Mobile Phone Ser)
vice) (see Bell System Technical Journal, Vol. 58, pages 1 to 14, January 1979). Automatic registration is for MSCs that are serving wireless terminals.
Is performed by notifying the user of his / her own position and information. The wireless terminal periodically transmits its identification information (mobile identification number (MIN) and electronic serial number (ESN)) to the MSC,
The MSC can automatically register by checking and updating the wireless terminal list. The MSC identifies the home wireless terminal based on the wireless terminal identification number.

The first generation wireless system will be described with reference to FIG. The wireless terminal is the first M in the home area A.
Confirmed by SC AcC. The HLR in the first MSC stores profiles for the wireless terminal, such as registration information, services assigned to the wireless terminal, and accounting management information. A
Movement within the area is controlled by the first MSC. However, when moving to area B, the first MSC passes control to the second MSC. To that end, the second MSC stores the record of the wireless terminal in the VLR. This record indicates that the second MSC is the first MSC.
C includes the wireless terminal profile obtained by SS7 from C and information related thereto. The wireless terminal is the VLR of the second MSC
When registered with, the activities in Area B are controlled by the second MSC.

[0017] Between the wireless terminal networks (inter-networ
k) First MSC to perform and report handoff
Information transmitted between the mobile station and the second MSC is referred to as mobility management information. The SS7 link, and in particular the IS-41 interface of the SS7 link, provides a communication path through which mobility management information is exchanged between networks.

The mobility management information is related to, but distinct from, the call control information. The call control information is exchange information that defines a route necessary for transmitting a voice or data signal to a final destination. Call control messages are communicated between the MSC and the wired switching equipment.

2. Second-generation wireless system: Compared to the first-generation wireless system, the second-generation wireless system employs digital modulation and has improved call processing capability. An example of the second generation wireless system is the Telecommunications Industry Association Standard IS-
Mobile Global Equipment (GSM), Personal Access Communication Equipment (P) using 45 (TDMA) and IS-95 (CDMA)
There are regional loop devices that use ACS (ACS), devices that comply with the Digital European Radiotelephone (DECT) standard, and the like.

As shown in FIG. 3, the second generation wireless system requests a reduced call processing request to the MSC, and has three basic parts, a base station subsystem (BASE).
STATION SUBSYSTEM: BSS), Network Switching Subsystem (NETWORK SWITCHING SUBSYSTEM: NSS),
It is a network structure consisting of a public network (PUBLIC NETWORK). For example, the mobile global device has a base station controller (B
SC) between the base station transceiver (BTS) and the MSC. However, the MSC in the moving global device
Is equipped with HLR, VLR, and AcC as usual, communicates with other MSCs via SS7 link, and is connected to a public wired network including a PSTN, an integrated information communication network (ISDN), and a public database. The structure to add BSC is BSC and MSC
Allows the standardization of the data interface between
Standardization of SC and base station components is also possible.

The second generation wireless system performs digital voice coding and digital modulation. The system uses a dedicated control channel (common channel signal) within the air interface to simultaneously exchange voice and control information between the wireless terminal, base station, and MSC while a call is in progress. Also M
Provides dedicated voice and signal trunks between SCs and between MSCs and public (wired) networks.

Unlike first-generation wireless systems for voice, second-generation devices are designed to be applied to paging and other data services (facsimile, high-speed data network access, etc.). The second generation wireless system finally provides wireless coverage by allowing wireless terminals to connect to the public network for different types of communication purposes, regardless of wireless terminal location or information location within the public network. PCS (Pe
rsonal Communication System) and PCN (Personal Co.)
mmunication Network).

The concept of PCS or PCN is based on AIN, which aims at complete access integration of all the mobile and fixed networks to access one huge network and the database therein. Also, AIN in theory
Now have one phone number that is used by all in wireless and wired devices. (The 43rd IEEE in 1993
IEEE Vehicular Technology Conferenc
e) See pages 696-699)

The network control structure in the second generation wireless system is more distributed (distri
buted) This is because the wireless terminal and the BSS perform more call processing. Such a fully distributed control structure indicates that MSCs are completely eliminated in the wireless system structure.

[0025]

SUMMARY OF THE INVENTION An object of the present invention is to provide an MS
In order to provide integrated wireless / wireless services to wireless terminals without the need for C, an integrated wired / wireless integrated device (Integrated Wireline-Wirele) that effectively uses existing wired switching equipment and functions
ss System: IWWS).

[0026]

According to the present invention , which solves the above-mentioned problems, a BSC and a radio service controller (VS) are provided.
In a wired / wireless integrated communication device including a wireless unit including a wireless communication unit ( CP) and a wired unit including an AIN SCP and an exchange, the wireless unit performs movement related to activities (calling and movement) of a wireless terminal.
Call control messages related to management information and transmitted / received data
The call control message is sent to the exchange via a signaling interface, and the mobility management information is
The above modified IS-41 interface allows AIN SC
P. BSC is GR-30
It communicates with the exchange through a three-signal interface, and communicates with a BTS that communicates with a wireless terminal via a wireless interface. The wireless interface is AMPS, TDMA, or CDMA. The switches are class 4 or class 5. The AIN SCP communicates with the switch using the AIN protocol on SS7 and connects to the HLR that stores wireless terminal data completely. VSCP includes VLR.

The following may be used. A radio subsystem including a VSCP and a radio subsystem communicating with each other over a modified IS-41 interface on SS7;
In a wired / wireless integrated communication device including an SCP and a wired unit including an exchange, a wireless unit relates to an activity of a wireless terminal.
Call control information related to mobility management information and transmitted / received data.
The call control message is sent to the exchange via a signaling interface, and the mobility management information is sent to the VSC via a modified IS-41 interface on SS7.
P is sent to the AIN SCP. The wireless subsystem performs data communication with a wireless terminal through a wireless interface and a BSC that communicates with an exchange in a wired unit through a GR-303 signal interface.
And a BTS that communicates. The wireless interface is AMPS, TDMA, or CDMA.
The switches are class 4 or class 5. AIN SCP
Communicates with the exchange through the AIN protocol on SS7, and includes the HLR and VLR. VSCP includes an authentication center or a short message center.

Such a call forming method for a wired / wireless integrated device includes a step of receiving a mobile identification number from a wireless terminal in a wireless subsystem when a call is made from a wireless terminal, and a step of transmitting a mobile identification number from the wireless subsystem to a VSCP. Sending a
Assigning an interface telephone number based on the mobile identification number in the VSCP, sending the interface telephone number from the VSCP to the wireless subsystem, and placing a call between the wireless subsystem and the switch by a signaling interface using the interface telephone number. And establishing. The signal interface is GR-30
3. Any one of ISUP, PRI and R2, and the exchange is class 5. When there is a call from the wireless terminal, VSC
The method further includes collecting a mobile identification number at P.

The call control message and the mobility management information communication method in the integrated wired / wireless apparatus include the steps of: receiving a mobile identification number from a wireless terminal in a wireless subsystem when a call is made from the wireless terminal; Transmitting the mobile identification number from the subsystem to the VSCP, assigning an interface telephone number based on the mobile identification number in the VSCP, sending the interface telephone number from the VSCP to the wireless subsystem, and using the interface telephone number Establishing an interface for call control messages between the wireless and wired units by a signal interface; generating mobility management information in the wireless unit;
Communicating the mobility management information from the CP to the AIN SCP by IS-41 on SS7. The signaling interface is GR-303 and the switch is a class 5 switch.

[0030]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 4 shows an IWWS structure according to the first embodiment of the present invention. IWWS includes a wireless portion and a wired portion. The main reason for this distinction is due to the US wired service and its regulations. The distinction between the two areas is
It will be meaningless with the increase in the function of the device, and it will be removed in the future by the elimination of communication regulations. Therefore, it should be understood that the current discussion describes the components of IWWS under current regulations, rather than assuming a wireless / wired division.

The IWWS of the present invention comprises a radio subsystem 100 of a radio section, a radio service controller (VSCP) 200
And the AIN SCP 300 of the wired section and the wired exchange 400
It is composed of Each component is described in detail below.

1. Wireless subsystem 100: The wireless subsystem 100 includes a BSC 110 and BTSs 120 and 121.
including.

(1) BTS 120, 121: BTS 12
0 and 121 access wireless terminals in the area covered by the wireless interface. The radio interface is AMPS, TDMA, CDMA, etc.
(IS-95) is the best. (The July 1993 TIA
/ EIA Provisional Standard-95 "Mobile-Base Station Compatible Standard for Dual-Mode Wideband Spread Spectrum Cellular Devices (Mobi
le Station-Base Station Compatibility Standard for
Dual-Mode Wideband Spread Spectrum Cellular Syst
em) ”)

(2) BSC 110: Recently, a class 5 switching system PCS device call processing / switching protocol has been defined. This call processing / switching protocol is "Generic C"
Call control related and mobility management related
Based on the so-called "C interface" that supports different types of signaling messages (December 1, 1995 ISDN C interface PCS CDMA special feature SR-3797
reference). In the present invention, the BS
A call control message is exchanged between the C110 and the exchange 400, and the wireless part (BSC and VSCP) and the wired part (AI
N SCP) exchanges mobility management information.

The first AcC (AcC-
1) cooperates with the second AcC (AcC-2) in the VSCP 200 so that the wireless device can access the exchange 400 as an initial stage of exchanging mobility management information with the VSCP 200. Access is completed by converting the mobile identification number into an interface telephone number and using it to form the required call reference value (CRV) for communication between BSC 110 and switch 400.

The mobile identification number is used to define the class certification required to identify individual wireless terminals and terminal information. The mobile identification number may simply indicate a previous grade certification. The interface telephone number defines the authentication operation in all network functions as described below.

The BSC 110 communicates with the exchange 400 through a GR-303 ABCD hybrid signal interface (hereinafter, GR-303). In contrast, the generic C call handling / switching protocol specifies ISDN BRI for call control signals and switch interfaces. However, ISDN BRI is not very popular, and many LAPD (software and hardware) terminators (terms).
ination) is very expensive. GR-303 is a widespread and cost effective switch interface. Therefore, GR-303 is an interface that is easier to realize.

The BSC 110 comprises a wireless terminal and a BTS 12
0, 121, which includes an internal BSC handoff controller (HC-1). The BSC 110 maintains call information (eg, MIN, IDN, call state, resources used, service delegation) for communicating wireless terminals. However, it is better not to include a database of wireless terminal profile data.

2. VSCP200: VSCP200 is
It communicates with the wireless subsystem 100 and the AIN SCP 300 via a modified IS-41 interface on SS7.

A feature of VSCP 200 is the use of interface telephone numbers. The interface telephone number is a spare telephone number used by a wireless device accessing the exchange 400. According to FIG. 5, each of the mobile identification numbers (MI
N−A to MIN−X), the VSCP2
BSC 110 with interface phone number from 00
Through the exchange 400.

When there is a call from the wireless terminal, the BSC 110
Captures the mobile identification number and sends it to the VSCP 200. VS
CP 200 transmits the interface telephone number to exchange 400
Send to The assignment information of the mobile identification number and the interface telephone number is stored in the BSC 110 and the VSCP 200.
BSC 110 sets up a call to switch 400 with the assigned interface telephone number. Therefore VSCP
Reference numeral 200 denotes a network element for allocating an interface telephone number for making a resource saving call connection.
From the perspective of switch 400 and the public network, the call originates from the interface telephone number.

Referring to FIG. 4, VSCP 200 is HL
Although R and VLR are included, the HLR may be separated from the VSCP 200 and connected by the IS-41 interface.
The authentication center (AC) or the short message center allows the wireless terminal to be authorized by a personal encryption protocol.
May be associated with LR.

The VLR of the VSCP 200 provides a mobile terminal with a mobility function. Here, all the automatic movement functions are specified by IS-41.2-C and IS-41.3-C inter-device handoff protocols.

The second AcC (AcC-2) is VSCP20
As the internal device of 0, the interface telephone number is allocated as described above.

The VSCP 200 also has an inter-BSC handoff controller (HC-2). HC-2 cooperates with the HLR and VLR to identify and process wireless terminals in the service area recognized by the BSC and calls in other BSC or MSC service areas. H with HC-1
The LR, VLR, and HC-2 form an access manager for all calls in the BSC 110 service area.

As another example, the VSCP 200 can be omitted from the IWWS according to the present invention as in the second embodiment shown in FIG. The function of VSCP200 is AIN SCP300
The BSC 110 is connected directly to the AIN SCP 300 by the modified IS-41 interface on SS7. Examples in which the VSCP 200 is not used include a structure in which movement between systems is not required, a structure in which global network handoff is not required, a wireless regional loop, or a similar system structure.

3. AIN SCP300: AIN SC
P is a location controller containing the logic and associated service functions for controlling the switch, in particular the class 5 switch. Currently, the AIN version 0.1 is widely used in the North American region. Therefore, class 5 switch and AIN 0.1 version switch 400
It is desirable to constitute.

The AIN SCP 300 can selectively connect to an HLR that completely stores wireless terminal data. As shown in FIG.
If not used, the AIN SCP 300 processes the signal from the class 5 switch for the wireless terminal, and if the required wireless terminal data is available on the local HLR or other device's HL.
Even if it exists in R, it can be specified. If the wireless terminal data exists on different devices, the AIN SCP 300
Send a message that is routed to the device using the global title translation. Such a device is called a serving service controller (SSCP).

When VSCP200 is used, AIN S
CP 300 coordinates communications between a Class 5 switch using AIN 0.1 / SS7-TCAP and VSCP 200 using IS-41C / SS7-TCAP.

4. Switch 400: Switch 400 makes a hardware connection to the PSTN for wireless terminals and other public lines, and is preferably a class 5 switch. However, AI
Improvements to the NSCP software also allow the use of class 4 switches. Class 5 exchanges currently provide POTS (ordinary telephone equipment) to wired wireless terminals and provide class (CLAS
S) Provide equipment. Within the IWWS structure of the present invention, such devices are available for wireless terminals.

The exchange 400 is connected to the BSC 110 through the GR-303 interface. But AIN
If a trunk method is used for the SCP 300 and the exchange 400, other interfaces such as ISUP, PRI, R1, and R2 can be used.

FIG. 7 shows the BSC 110 and the class 5 switch 40.
0 shows a GR-303 connection to 0. The GR-303 interface can have 2 to 28 DS1 lines,
Each DS1 line can handle 24 calls. Therefore, 24 × 28 calls can be processed simultaneously. Further GR
-303 can have 2048 line terminations. The call reference value corresponds one-to-one with the number assigned by the interface telephone number. Therefore, CR
There is a 1: 1 correspondence between V and IDN.

[0054]

According to the present invention, it is possible to provide a wired / wireless integrated service by effectively using existing wired switching equipment and functions without MSC. This provided economic and technical benefits such as reduced network equipment purchase and maintenance costs, and simplified equipment integration. In addition, another MS
Without depending on C, a low-cost wireless service can be provided by using an existing wired function. Also, the physical operation and maintenance center can be centralized by integrating wired telephone numbers.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a cellular system.

FIG. 2 is a structural diagram of a first generation wireless system.

FIG. 3 is a structural diagram of a second-generation wireless system.

FIG. 4 is an IWWS structure diagram of the first embodiment of the present invention.

FIG. 5 is a configuration diagram of a BSC, a VSCP, and an exchange.

FIG. 6 is an IWWS structure diagram according to a second embodiment of the present invention.

FIG. 7 is a diagram showing a GR-303 connection.

[Explanation of symbols]

 Reference Signs List 100 wireless subsystem 110 BSC 120, 121 BTS 200 VSCP 300 AIN SCP 400 switch

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04B 7/26 H04Q ⁷ /04-7/38 H04L 12/28 H04L 12/46

Claims (21)

(57) [Claims] A wireless unit including a BSC and a VSCP;
In a wired / wireless integrated communication device comprising an IN SCP and a wired unit including an exchange, the wireless unit uses the mobile unit to manage mobility management information relating to calling and movement of the wireless terminal.
And a call control message relating to data to be transmitted and received, wherein the call control message is sent to the exchange via a signaling interface, and the mobility management information is sent to the AIN SCP via a modified IS-41 interface on SS7. Wired and wireless integrated communication device. 2. The integrated wired / wireless communication apparatus according to claim 1, wherein the BSC communicates with a wired exchange via a GR-303 signal interface, and communicates with a BTS which communicates with a wireless terminal via a wireless interface. 3. The radio interface is AMPS, TDM
3. The wired / wireless integrated communication device according to claim 2, wherein the device is A or CDMA. 4. The integrated wired / wireless communication apparatus according to claim 1, wherein the exchange is a class 4 or a class 5. 5. The integrated wired / wireless communication apparatus according to claim 1, wherein the AIN SCP communicates with the exchange according to the AIN protocol on SS7. 6. The integrated wired / wireless communication apparatus according to claim 5, wherein the AIN SCP connects to the HLR in which wireless terminal data is completely stored. 7. The integrated wired / wireless communication apparatus according to claim 6, wherein the VSCP includes a VLR. 8. A radio subsystem and VSCP communicating with each other over a modified IS-41 interface on SS7.
In a wired / wireless integrated communication device comprising: a wireless unit including a wireless terminal and a wired unit including an AIN SCP and an exchange, the wireless unit includes:
And a call control message relating to data to be transmitted and received. The call control message is sent to the exchange via a signaling interface, and the mobility management information is transmitted from the VSCP to the AIN via the modified IS-41 interface on SS7.
An integrated wired / wireless communication device, which is sent to an SCP. 9. The wireless subsystem comprises a BSC that communicates with a wired exchange via a GR-303 signal interface.
9. The wired / wireless integrated communication device according to claim 8, comprising: a BTS that performs data communication with a wireless terminal via a wireless interface and communicates with a BSC. 10. The wireless interface is AMPS, TD
The integrated wired / wireless communication device according to claim 9, which is MA or CDMA. 11. The integrated wired / wireless communication apparatus according to claim 8, wherein the exchange is a class 4 or a class 5. 12. The AIN SCP operates on the AIN on SS7.
9. The integrated wired / wireless communication device according to claim 8, wherein the integrated wired / wireless communication device communicates with the exchange by a protocol. 13. The integrated wired / wireless communication apparatus according to claim 12, wherein the AIN SCP includes an HLR and a VLR. 14. The integrated wired / wireless communication apparatus according to claim 13, wherein the VSCP includes an authentication center or a short message center. 15. A method for forming a call in a wired / wireless integrated device, comprising: receiving a mobile identification number from a wireless terminal in a wireless subsystem when a call is made from the wireless terminal; and identifying a mobile identification from the wireless subsystem to a VSCP. Transmitting the number, VS
Allocating an interface telephone number based on the mobile identification number at the CP, sending the interface telephone number from the VSCP to the wireless subsystem, and placing a call between the wireless subsystem and the exchange by a signaling interface using the interface telephone number. Establishing a call. 16. The signal interface is GR-303,
16. The call forming method according to claim 15, wherein the call is any one of ISUP, PRI, and R2. 17. The call forming method according to claim 15, wherein the exchange is a class 5. 18. When a call is made from a wireless terminal, VSCP
16. The method of claim 15, further comprising the step of collecting a mobile identification number.
The call forming method as described in the above. 19. A radio unit having a VSCP and an AIN SC
A method for communicating a call control message and a mobility management information in a wired / wireless integrated device comprising a wired unit having a P, comprising: receiving a mobile identification number from a wireless terminal in a wireless subsystem when a call is made from the wireless terminal; Transmitting a mobile identification number from the radio subsystem to the VSCP;
Allocating the interface telephone number based on the mobile identification number in the CP, sending the interface telephone number from the VSCP to the wireless subsystem, and controlling the call between the wireless unit and the wired unit by the signal interface using the interface telephone number. Establishing an interface for messages, generating mobility management information in the radio unit, and transmitting the IS-4 on SS7 from the VSCP to the AIN SCP.
And a step of communicating mobility management information according to (1). 20. The method according to claim 19, wherein the signaling interface is GR-303. 21. The method according to claim 19, wherein the exchange is a class 5 exchange.