Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
1998-10-26
2001-12-11
Chang, Vivian (Department: 2682)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S067700, C455S560000, C379S002000
Reexamination Certificate
active
06330440
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a mobile communication system and more particularly to a method of automatically assigning signaling terminals between a switching center and a base station.
2. Description of Related Art
Generally, a mobile communication system is a system allowing for communications during motion. A code division multiple access (CDMA) mobile communication system converts sequential analog signals into codes for transmission. This CDMA system provides a mobile communication mode which is convenient in processing noise and has an advantage of a little power consumption.
FIG. 1
shows a structure of the international telecommunications union-telecommunication sector (ITU-T) No. 7 signaling system in the typical mobile communication system.
As shown in
FIG. 1
, a base station (BS)
10
for transmitting and receiving messages to and from terminal equipment and switching centers and managing resources and a mobile switching center (MSC)
15
connected to the base station
10
, for connecting subscribers
1
and operating for mobile communication services such as a function of charging for use of the system, respectively comprise: first and second base station application parts (B SAP)
11
and
16
dually designed (active and standby) for processing origination and destination of each mobile call, managing the resources, and transmitting subscriber's mobile managing messages; first and second signaling connection control parts (SCCP)
12
and
17
having dual structure, for performing a switch network data service, connection mode service for transferring control information between network management centers, a connectionless mode service for mobile calls, and a routing processing function; and first and second message transfer parts (MTP)
13
and
18
having a dual structure for processing a signaling message and performing a signaling network management function for error recovery and process on the process route of the processed signaling message.
FIG. 2
is a block diagram of hardware supporting a function of the typical ITU-T No. 7 signaling system, particularly, an access switch subsystem mobile (ASS-M) falling under an access switch subsystem (ASS) of the HDPX-300 (the Hyundai PCS exchange).
As shown in
FIG. 2
, the hardware comprises: a main processor & duplication control board assembly (MPDA~
21
to
23
designed in dual which has software for managing the BSAP
11
,
26
, SCCP
12
,
17
, and MTP
13
,
26
; a signaling system process board assembly (SSPA)
24
to
16
designed in dual which has software for processing a level
3
of the MTP
13
,
18
and connection and connectionless mode messages of the SCCP
12
,
17
in the MPDA
21
; and a signaling system firmware board assembly (SSFA)
27
to
29
designed in dual which has software for a level
2
of the MTP
13
,
18
in the MPDA
21
and four firmwares.
The MPDA
21
to
23
correspond to an ASS-M access switching processor (ASP), and the SSPA
24
to
26
correspond to the base station application part (BSAP).
Such ASS-M connects to a base station controller and performs a function of processing mobile subscribers calls and managing mobility, a self-maintenance function, a function of transmitting signal information to the base station, mobile station, and base station controller, and a traffic data transmitting function.
FIG. 3
shows a structure of software for supporting the functions of the typical ITU-T No. 7 signaling system.
As shown in
FIG. 3
, there exist: a base station application part (BSAP)
31
having a direct transfer application part (DTAP) and a base station management application part (BSMAP), for processing the origination and destination of mobile calls using the connection and connectionless mode services, managing the resources, and transmitting the subscriber's mobility managing messages; an internal network management part (B
7
INT)
32
for managing active and standby modes of a mobile signaling handling processor (MSHP), initializing and recovering data of the MSHP, and managing L
2
(level
2
) firmware of the SSFA
27
; an SCCP management part (B
7
SMG)
33
for managing a signaling,point and subsystem of the SCCP
12
,
17
in the other office and a subsystem of its own office; an MTP management part (B
7
NM)
34
for performing a signaling network managing function of recovering and processing errors on the process route of the signal message of the MTP
13
,
18
; an MSHP of ASS-M
35
having a BMHS
36
for providing the connection and connectionless mode services to the SCCP
12
,
17
and processing the routing and a B
7
MH
37
for performing the signal message processing of the MTP
13
,
18
.
FIG. 4
is a block diagram showing a structure between the SSPA
24
to
26
and SSFA
27
to
29
depicted in FIG.
2
.
As shown in
FIG. 4
, there exist: first to fourth SSFAs
41
to
44
having four firmwares, for serving a level
2
of the functions of the typical ITU-T No. 7 signaling system for transmission of signaling messages of the MPDA
21
to
23
; first and second SSPAs
45
and
46
connecting to the first to fourth SSFA
41
to
44
, for serving a level
3
of the typical ITU-T No. 7 signaling system's functions in the MPDA
21
to
23
; first and second integrated global communication board assemblies (IGCAs)
47
and
48
connecting to the first and second SSPAs
45
and
46
, for providing routes for processing the signaling messages of the MSHP
35
.
The ITU-T No. 7 signaling system having such structure performs dual functions of active and standby modes, supports flow of messages through the protocol No. 7 in interlock of the switching center and base station, the interlock indicating that entities use the same hardware/software signals and parameters, and operates such that the MSHP
35
, which is a processor of the SSPA
24
, manages the SCCEI
12
,
17
and MTP
13
,
18
with conception of dualization. The MSHP
35
is a message handling processor for processing messages based upon the typical ITU-T No. 7 signaling system, the processor being one of auxiliary processors each having a unique functions in a switch, and more particularly, a hardware board for actually routing routing the messages received. The MSHP
35
is concerned with the messages, and the SSFA
41
to
44
performs a function of maintaining and supporting paths of the messages through connection to the other office in hardware.
An interface between the base station
10
and the mobile switching center
15
, for supporting the international standard (IS)-634, supports open-system type interlock. The A-interface is standard for connection between the mobile switching center and control station in the mobile communication system, and there are standards A, B, C, and D defined according to each interlocked connection point once the system is constructed based upon the open protocol A-interface, it would be interlocked through the connection in hardware.
The MSHP
35
has idle, standby, acting, and active states and has information about a point of its own office, signaling point, signaling link, and subsystem. When two MSHPS
35
are used, one is in the active state and the other is in the standby state. When one MSHP
35
is used and the other is not in use, only the MSHP
35
in use becomes to be in the active state and the other becomes to be in the idle state. When the MSHP
35
converts from the idle state to the active or standby state, it stays at a wait state between the two states for a little while, which corresponds to the acting state.
Management of signaling terminals using a conventional load share method to manage such MSHP
35
is effected as follows.
The MSHP
35
is supposed to be in an activation or inactivation state. The MSHP
35
actually needs software for processing messages and data for routing the messages. The activation of the MSHP
35
indicates the state at the time point when the loading of the message processing software on the MSHP
35
is completed and the transmission of
Ban Dong-Soo
Lee Dong-Hyun
Park Dong-Seo
Chang Vivian
Hyundai Electronics Ind. Co., LTD
Moore James
Nissen J. Harold
Siegel Lackenbach
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