CN110891248A - Method for realizing interconnection and intercommunication between digital cluster systems - Google Patents
Method for realizing interconnection and intercommunication between digital cluster systems Download PDFInfo
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- CN110891248A CN110891248A CN201911172050.7A CN201911172050A CN110891248A CN 110891248 A CN110891248 A CN 110891248A CN 201911172050 A CN201911172050 A CN 201911172050A CN 110891248 A CN110891248 A CN 110891248A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/08—Protocols for interworking; Protocol conversion
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- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
- H04W4/10—Push-to-Talk [PTT] or Push-On-Call services
Abstract
The invention discloses a method for realizing interconnection and intercommunication among digital cluster systems. The system consists of an interconnection switching center IMSC and a plurality of interconnection base stations IBS. The interconnection switching center has two functions, one is used for controlling and managing a plurality of interconnection base stations, and the other is used for providing a standard interconnection interface between systems and is used for interconnection and intercommunication with a digital trunking system of other interconnection interfaces between open systems. One end of the inter-system interconnection equipment is connected to base station equipment of a certain brand digital trunking system through an antenna feeder or an air interface, and the other end of the inter-system interconnection equipment is connected to the digital trunking system at the other end through Ethernet or E1. In the method, an interface between the open systems of the different systems is not needed, and only standard air interface signaling is needed to be obtained to realize interconnection. The base station equipment for interconnection and intercommunication of the digital cluster registers and attaches the personal number and the group number needing intercommunication to the digital cluster system of the opposite terminal by using an air interface signaling through a standard air interface. The functions of individual calling, group calling, short data, scheduling service and the like of a cross system can be realized.
Description
Technical Field
The invention belongs to the field of digital trunking communication, and particularly relates to a method for interconnection and intercommunication among digital trunking systems.
Background
The digital trunking communication system is a professional mobile communication system, early TETRA digital trunking communication system equipment technology is only mastered in a few foreign manufacturers, although the TETRA standard defines interconnection interfaces among systems, in practice, in the market, manufacturers protect their ground and prevent other competitors from entering, the manufacturers who enter first often do not want to cooperate with each other to carry out interconnection and intercommunication debugging, so that interconnection and intercommunication between TETRA systems of different manufacturers and between TETRA systems, between TETRA systems and PDT systems, and between TETRA systems and LTE systems cannot be realized, therefore, interconnection and intercommunication among digital trunking communication systems of different systems are still a difficult problem to realize across different manufacturers of systems, and a certain distance is required to be taken.
The demand for interconnection and intercommunication among digital trunking communication systems in the market is urgent, and the demand mainly comprises two parts: one part is the interconnection and intercommunication of different TETRA/PDT systems, and the other part is the interconnection and intercommunication of the TETRA digital trunking communication system and the LTE wide-narrow digital trunking communication system.
At present, the intercommunication mode among digital trunking communication systems of different manufacturers is realized by embedding a digital trunking vehicle platform into an opposite end system, namely a back-to-back mode is used, but the mode can only realize one-to-one intercommunication of group calling, and has the advantages of difficult capacity expansion, limited use and simple function. However, the user's requirements often include not only inter-system group calls but also inter-system single calls, inter-system short data, inter-system scheduling services, and other interworking services. The increasing demand for interconnection and intercommunication between systems is difficult to meet by the existing methods. Interconnection base station equipment of interconnection and intercommunication among digital trunking systems a novel interconnection equipment among digital trunking systems, it can adapt to the environment of the end system more flexibly, can insert the standard digital trunking system of different producers fast, and build conveniently, can support the multichannel group call between the systems simultaneously and call, can also solve the problem such as single call and intersystem short data service, dispatch service between the system, can realize the interconnection and intercommunication among the TETRA systems of different producers, the interconnection and intercommunication between TETRA system and PDT system, the interconnection and intercommunication between TETRA system and LTE system.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the technical scheme for realizing interconnection and intercommunication among digital cluster systems is provided, and the method can realize interconnection among digital cluster base stations of different manufacturers and different systems, support multi-path calling, and support functions of group calling, individual calling, short data, scheduling service and the like among systems.
The technical scheme adopted by the invention is as follows:
a method for realizing interconnection and intercommunication of a digital cluster system comprises the following steps:
(1) constructing inter-system interconnection equipment comprising an interconnection base station and an IMSC (inertial measurement System center); the interconnected base station comprises an interconnected base station controller and a plurality of interconnected transceivers;
(2) initializing an interconnected base station: the method comprises the steps that an interconnection base station controller obtains configuration information of transmitting and receiving frequency points and sends the configuration information to an interconnection transceiver when the configuration information is effective, the interconnection transceiver receives a TETRA standard air interface broadcast signaling message at the receiving frequency point, and the interconnection base station enters a working state after receiving the TETRA standard air interface broadcast signaling message;
(3) the interconnected base station performs air interface configuration, including an air interface sending process and an air interface receiving process;
the air interface sending process comprises: after entering a working state, the interconnection base station controller reads configured user related information, generates a user registration request signaling message when the configuration information is effective, and transmits the user registration request signaling message to an interconnection transceiver after coding and decoding, and the interconnection transceiver transmits the received signaling message to an opposite-end digital cluster base station through an air interface;
the air interface receiving process comprises the following steps: the interconnection transceiver receives an air interface message of an opposite terminal digital cluster base station and then sends the air interface message to an interconnection base station controller, the interconnection base station controller decodes the air interface message and detects the validity of the air interface message, if the air interface message is valid, the interconnection transceiver encodes the air interface message and then sends the air interface message to an IMSC (inertial measurement System); otherwise, continuing to wait for receiving the air interface message;
(4) after the air interface configuration of the interconnected base station is finished, the interconnected base station and an IMSC (inertial measurement System) switching center jointly finish data forwarding between different digital trunking base stations, including uplink data forwarding and downlink data forwarding;
the uplink data forwarding process comprises the following steps: after receiving data from the air interface, the interconnection transceiver modulates and demodulates the air interface data, and then sends the data to the interconnection base station controller, and the interconnection base station controller carries out signaling scheduling, coding and signaling conversion on the data and then carries out switching processing by an IMSC (integrated multimedia subsystem) switching center;
the downlink data forwarding process comprises the following steps: the IMSC sends the received signaling to an interconnection base station controller, the interconnection base station controller encodes the signaling, converts the signaling, then sends the signaling to an interconnection transceiver based on the signaling scheduling processing of the TETRA time slot, and the interconnection transceiver modulates and demodulates the data and then sends the data to an air interface.
Wherein the step (2) comprises the steps of:
(201) a signaling transceiver module of an interconnection base station controller acquires configuration information of transmitting and receiving frequency points, detects whether the configuration information is valid, if the configuration information is invalid, the interconnection base station is in a standby state, and if the configuration information is valid, the configuration information is sent to an interconnection transceiver; the transmitting frequency point of the interconnected base station is the receiving frequency point of the opposite-end digital trunking base station, and the receiving frequency point of the interconnected base station is the transmitting frequency point of the opposite-end digital trunking base station;
(202) the interconnected transceiver enters a working state after receiving the configuration information, and detects whether a TETRA standard air interface broadcast signaling message is received at a receiving frequency point; if the air interface broadcast signaling of the TETRA standard is not received, the interconnected base station is in a standby state, and if the air interface broadcast signaling of the TETRA standard is received, the interconnected base station is in a working state and sends an indication of entering the working state to a signaling protocol conversion module of an interconnected base station controller.
Wherein, the air interface sending process in the step (3) comprises the following steps:
(301) after the interconnected base station enters a working state, a signaling protocol conversion module of an interconnected base station controller reads configured user related information;
(302) the signaling protocol conversion module checks the validity of the configuration data, if the configuration data is invalid, the initial interconnected base station state is the configuration state, and if the configuration data is valid, a user registration request signaling message is sent to an interconnected protocol stack of an interconnected base station controller;
(303) the interconnection protocol stack receives a user registration request signaling message sent by the signaling protocol conversion module and then carries out coding and decoding, and the coded and decoded message is sent to an interconnection transceiver through a signaling transceiver module of an interconnection base station controller;
(304) the interconnection transceiver sends the received signaling message to the opposite-end digital cluster base station through an air interface; if the air interface message is failed to be sent, an error report instruction is sent to the signaling protocol conversion module, and if the air interface message is successfully sent, a success report instruction is sent to the signaling protocol conversion module.
Wherein, the air interface receiving process in the step (3) comprises the following steps:
(401) after receiving an air interface message of an opposite terminal digital cluster base station, the interconnection transceiver sends the air interface message to a signaling transceiver module of an interconnection base station controller;
(402) the signaling transceiver module receives the air interface message of the interconnected transceiver, modulates and demodulates the air interface message, and then sends the air interface message to an interconnected protocol stack of an interconnected base station controller;
(403) the interconnection protocol stack decodes the air interface message, if the interconnection protocol stack decoding fails, the interconnection protocol stack continues to wait for receiving the air interface message, and if the interconnection protocol stack decoding succeeds, the decoded message is sent to a signaling protocol conversion module of the interconnection base station controller;
(404) the signaling protocol conversion module checks whether the message is valid; if the message is invalid, continuing to wait for receiving an air interface message; if the signaling protocol conversion module checks that the message is valid, the signaling protocol conversion module sends the message to a base station side protocol stack of the interconnected base station controller;
(405) after receiving the message of the signaling protocol conversion module, the protocol stack at the base station side encodes the message and sends the encoded message to the IMSC.
Wherein, the uplink data forwarding process in the step (4) comprises the following steps:
(501) after receiving data from the air interface, the interconnection transceiver modulates and demodulates the air interface data, judges the effectiveness of the data and then sends the data to a signaling transceiver module of an interconnection base station controller;
(502) the signaling transceiver module completes signaling scheduling processing based on TETRA time slot on the air interface data, then sends the data to the interconnection protocol stack of the interconnection base station controller for coding and decoding processing, the coded and decoded data carries out signaling conversion through the signaling protocol conversion module of the interconnection base station controller, and the signaling of the uplink mobile station is converted into the base station side signaling and then sent to the base station side protocol stack of the interconnection base station controller;
(503) the protocol stack at the base station side encodes the data and then sends the data to the IMSC switching center, and the IMSC switching center performs signaling switching processing on the uplink data.
Wherein, the downlink data forwarding process in the step (4) comprises the following steps:
(601) the IMSC completes the switching processing of the signaling and then sends the signaling to a base station side protocol stack of the interconnected base station controller;
(602) the base station side protocol stack encodes the data, completes the conversion of the base station side signaling through the signaling conversion module of the interconnected base station controller, converts the data into the signaling of the mobile station, completes the encoding and decoding processing through the interconnected protocol stack of the interconnected base station controller, and finally sends the signaling scheduling processing based on the TETRA time slot to the interconnected transceiver through the signaling transceiver module of the interconnected base station controller;
(603) after receiving the data of the interconnected base station controller, the interconnected transceiver modulates and demodulates the data and then sends the data to the air interface.
Compared with the prior art, the invention has the advantages that:
the invention can be more flexibly adapted to the environment of an opposite terminal system, can be quickly accessed to standard digital trunking systems of different manufacturers, is convenient to build, can simultaneously support multi-path group calling among systems, can solve the problems of single calling among systems, short data service and scheduling service among systems, and can realize interconnection and intercommunication among TETRA systems of different manufacturers, interconnection and intercommunication between the TETRA systems and a PDT system, and interconnection and intercommunication between the TETRA systems and an LTE system.
Drawings
Fig. 1 is an architecture diagram of the inter-system interconnection apparatus of the present invention.
FIG. 2 is a connection diagram (1) of the inventive intersystem interconnect device.
Fig. 3 is a traffic flow diagram (1) of the inter-system interconnection device of the present invention.
FIG. 4 is a connection diagram (2) of the inventive intersystem interconnect device.
FIG. 5 is a traffic flow diagram (2) of the inter-system interconnection apparatus of the present invention
Fig. 6 is a block diagram of the hardware of the interconnected base stations of the present invention.
Fig. 7 is a block diagram of the software of the interconnected base stations of the present invention.
Fig. 8 is a flow chart of the start-up of the interconnected base station of the present invention.
Fig. 9 is a flow chart of air interface transmission of an interconnected base station according to the present invention.
Fig. 10 is a flow chart of air interface reception of an interconnected base station according to the present invention.
FIG. 11 is a flow chart of the present invention for processing uplink data.
Fig. 12 is a flow chart of the downlink data processing of the present invention.
Detailed Description
The invention is further explained below with reference to the drawings.
The invention discloses a method for realizing interconnection and intercommunication among digital cluster systems. One end of the inter-system interconnection equipment for interconnection and intercommunication among the digital cluster systems is connected to the base station equipment of the different-brand digital cluster systems through an antenna feeder or an air interface, and the other end of the inter-system interconnection equipment is connected to the digital cluster system at the other end through Ethernet or E1. In the method, an interface between the open systems of the different systems is not needed, and only standard air interface signaling is needed to be obtained to realize interconnection.
The technical scheme of the inter-system interconnection equipment for interconnection and intercommunication among the digital cluster systems is that a digital cluster base station of an opposite side system is connected through an air interface/radio frequency feeder line, and the inter-system interconnection equipment registers and attaches a personal number and a group number which need to be intercommunicated to the digital cluster system of the opposite side through a standard air interface by using an air interface signaling. The scheme can realize functions of cross-system individual calling, group calling, short data, scheduling service and the like.
The inter-system interconnection equipment for interconnection and intercommunication among digital trunking systems is used for realizing interconnection and intercommunication among digital trunking systems of different communication systems of two different manufacturers, the architecture of the inter-system interconnection equipment is shown in fig. 1, and the inter-system interconnection equipment for interconnection and intercommunication among digital trunking systems comprises an IMSC (inertial measurement System) switching center and a plurality of interconnection base stations IBS (interconnection base station). The IMSC has two functions, one is used for controlling and managing a plurality of interconnected base stations IBS, and the other is to provide a standard intersystem interconnection interface for interconnection and intercommunication with other digital trunking systems of an open intersystem interconnection interface.
The interconnection equipment among the systems of the interconnection and intercommunication among the digital cluster systems supports various connection modes. If the Mobile switching center MSC1(Mobile switching center) does not open the inter-system interconnection interface in the interconnection scenario, and the Mobile switching center MSC2 opens the inter-system interconnection interface, one end of the inter-system interconnection device is connected to the digital trunking system without the open interface through an antenna feeder or an air interface; the other end is connected with the digital cluster system of the open intersystem interconnection interface through the intersystem interconnection interface. And the interconnection between the two digital cluster systems is realized through the interconnection equipment between the systems. The connection mode is shown in fig. 2, and the data flow is shown in fig. 3.
If the mobile switching center MSC1 does not open the inter-system interconnection interface in the interconnection scenario, and the mobile switching center MSC2 does not open the inter-system interconnection interface, one end of the inter-system interconnection device is connected to the digital trunking system with the unopened interface through an antenna feeder or an air interface; the other end is butted with the digital cluster system with an unopened interface through an antenna feeder or an air interface. And the interconnection between the two digital cluster systems is realized through the interconnection equipment between the systems. The connection is shown in fig. 4, and the data flow is shown in fig. 5.
The interconnected base station IBS mainly comprises an interconnected base station controller IBSC, interconnected transceivers IBRU and an interconnected radio frequency distribution system IRFDS, wherein the interconnected base station controller IBSC in the interconnected base station IBS is mainly used for receiving and processing air interface signaling of an opposite-end digital trunking system and receiving each transceiver of the opposite-end digital trunking system base station which is interconnected corresponding to the interconnected transceivers IBRU, thereby realizing the receiving and sending of the air interface signaling of the transceivers of the interconnected opposite-end digital trunking system base station. A system architecture diagram of an inter-connected base station IBS is shown in fig. 6.
The interconnected base station is used for realizing the butt joint with an antenna feeder or an air interface of a base station under an opposite terminal digital cluster system and realizing the receiving and transmitting control of standard air interface signaling. The interconnected base station and the base station of the opposite terminal digital cluster system are interconnected and intercommunicated through an air interface, signaling and voice are obtained and converted from an air interface layer, and interconnection and intercommunication are carried out by using a TETRA standard air interface. The air interface of the TETRA system standard defines a mandatory standard, and the air interface can provide complete end-to-end functions of the cluster. Based on the air interface signaling, the interconnected base station analyzes call signaling and flow between TETRA networks, analyzes signaling and media, and realizes conversion of trunking call signaling.
The software architecture of the interconnected base stations is shown in fig. 7; the interconnected base station is composed of an interconnected base station controller and an interconnected transceiver; the interconnected base station controller consists of a base station side protocol stack, a signaling protocol conversion module, an interconnected protocol stack and a signaling transceiver module. The functions of each module in the interconnected base station are as follows:
the protocol stack at the base station side is a protocol stack at the TETRA base station side, and is mainly used for analyzing signaling in two directions: after receiving the message sent by the signaling protocol conversion module, the signaling is coded into the uplink signaling of the base station side and sent to the IMSC; the signaling protocol conversion module is used for receiving signaling sent by the IMSC, coding the signaling into downlink signaling of the base station and sending the downlink signaling to the signaling protocol conversion module.
The signaling protocol conversion module is an important network element in the interconnected base station, and is mainly used for analyzing the signaling sent from two directions, converting the base station signaling of the opposite terminal digital trunking system into the signaling of an IMSC center and sending the signaling to the IMSC center; and converting the IMSC center signaling into mobile station signaling and sending the mobile station signaling to a base station of the opposite-end digital trunking system.
And the signaling transceiver module calls LLC and UMAC protocol stacks and transmits and receives signaling with the interconnection transceiver IBRU, and is based on a TETRA frame time-triggered scheduler, wherein the triggering interval is 14.167 ms.
The functions of each protocol stack in the interconnection protocol stack are as follows:
the UMAC protocol stack is located at the second layer of the TETRA protocol stack between the LLC (also at the second layer) and the signaling transceiver module. The system is responsible for sending uplink data to a signaling transceiver module according to a certain format requirement, processing the data from the signaling transceiver module, sending the data to an upper layer, and simultaneously completing functions of wireless channel access, service channel appropriation and the like.
The main function of the LLC protocol stack is to provide a point-to-point logical link for Protocol Data Units (PDUs) in the upper layers. The LLC protocol stack subsystem is located at an upper layer of the air interface layer 2. The functions mainly provided comprise the responsibility for signaling data transmission, broadcasting and layer management message forwarding, and are only suitable for C-plane operation. Performing basic link service, exchanging messages with the MLE layer, processing REPORT indication, and interacting with UMAC layer messages. Error detection and timeout retransmission control are also included. Broadcast and inter-layer management messages are transmitted.
The function of the MLE protocol stack is primarily responsible for the maintenance of the mobile-to-base station link. The MLE has the function of high-level convergence at the same time, and provides a uniform platform for accessing the services of the second-level entity for the third-level entity. The main functions implemented by MLE are: data transmission, information exchange among layers, and receiving, storing and transmitting of network broadcast information.
The CMCE protocol stack is positioned at the upper layer of the third layer of the TETRA air interface protocol, and mainly comprises the following functional entities: call control CC, supplementary service SS and short message SDS. In the interconnection protocol stack, the upper layer (SU, service user) of the CMCE protocol stack is a signaling protocol conversion module, and the lower layer of the CMCE protocol stack is an MLE protocol stack.
The MM protocol stack is located at the third layer and is responsible for managing MS mobility related services such as registration, de-registration, group attach/de-attach, etc. In the interconnection protocol stack, the upper layer (SU, service user) of the MM protocol stack is a signaling protocol conversion module, and the lower layer of the MM protocol stack is an MLE protocol stack.
The method of the present invention is described in further detail below with reference to the accompanying drawings.
1) A boot startup procedure, as shown in fig. 8;
step 1: starting up a system, entering an initialization process, acquiring configuration information of transmitting and receiving frequency points by a signaling transceiver module of an interconnected base station controller, detecting whether the configuration information is valid, if the configuration information is invalid, the interconnected base station is in a standby state, and if the configuration information is valid, transmitting the configuration information to an interconnected transceiver; the transmitting frequency point of the interconnected base station is the receiving frequency point of the opposite-end digital trunking base station, and the receiving frequency point of the interconnected base station is the transmitting frequency point of the opposite-end digital trunking base station;
step 2: the interconnected transceiver enters a working state after receiving the configuration information, and detects whether a TETRA standard air interface broadcast signaling message is received at a receiving frequency point; if the air interface broadcast signaling of the TETRA standard is not received, the interconnected base station is in a standby state, and if the air interface broadcast signaling of the TETRA standard is received, the interconnected base station is in a working state;
and step 3: the interconnection transceiver sends the indication that the system enters the working state to a signaling protocol conversion module of the interconnection base station controller;
2) an air interface sending flow, as shown in fig. 9;
step 1: after a signaling protocol conversion module of the interconnected base station controller receives an indication message of a system entering a working state, reading configured user related information;
step 2: the signaling protocol conversion module checks the validity of the configuration data, if the configuration data is invalid, the initial interconnected base station state is the configuration state, and if the configuration data is valid, a user registration request signaling message is sent to an interconnected protocol stack of an interconnected base station controller;
and step 3: the interconnection protocol stack receives a user registration request signaling message sent by the signaling protocol conversion module and then carries out coding and decoding, and the coded and decoded message is sent to an interconnection transceiver through a signaling transceiver module of an interconnection base station controller;
and 4, step 4: the interconnection transceiver sends the received signaling message to the opposite-end digital cluster base station through an air interface; if the air interface message is failed to be sent, an error report instruction is sent to the signaling protocol conversion module, and if the air interface message is successfully sent, a success report instruction is sent to the signaling protocol conversion module.
3) An air interface receiving procedure, as shown in fig. 10;
step 1: the signaling transceiver module receives the air interface message of the interconnected transceiver, modulates and demodulates the air interface message, and then sends the air interface message to an interconnected protocol stack of an interconnected base station controller;
step 2: the signaling transceiver module receives the air interface message of the interconnected transceiver, modulates and demodulates the air interface message, and then sends the air interface message to an interconnected protocol stack of an interconnected base station controller;
and step 3: the interconnection protocol stack decodes the air interface message, if the interconnection protocol stack decoding fails, the interconnection protocol stack continues to wait for receiving the air interface message, and if the interconnection protocol stack decoding succeeds, the decoded message is sent to a signaling protocol conversion module of the interconnection base station controller;
and 4, step 4: the signaling protocol conversion module checks whether the message is valid; if the message is invalid, continuing to wait for receiving an air interface message; if the signaling protocol conversion module checks that the message is valid, the signaling protocol conversion module sends the message to a base station side protocol stack of the interconnected base station controller;
and 5: after receiving the message of the signaling protocol conversion module, the protocol stack at the base station side encodes the message and sends the encoded message to the IMSC.
4) The uplink data processing flow, as shown in fig. 11;
step 1: after receiving data from the air interface, the interconnection transceiver modulates and demodulates the air interface data, judges the effectiveness of the data and then sends the data to a signaling transceiver module of an interconnection base station controller;
step 2: the signaling transceiver module completes signaling scheduling processing based on TETRA time slot on the air interface data, then sends the data to the interconnection protocol stack of the interconnection base station controller for coding and decoding processing, the coded and decoded data carries out signaling conversion through the signaling protocol conversion module of the interconnection base station controller, and the signaling of the uplink mobile station is converted into the base station side signaling and then sent to the base station side protocol stack of the interconnection base station controller;
and step 3: the protocol stack at the base station side encodes the data and then sends the data to the IMSC switching center, and the IMSC switching center performs signaling switching processing on the uplink data.
5) A downlink data processing flow, as shown in fig. 12;
step 1: the IMSC completes the switching processing of the signaling and then sends the signaling to a base station side protocol stack of the interconnected base station controller;
step 2: the base station side protocol stack encodes the data, completes the conversion of the base station side signaling through the signaling conversion module of the interconnected base station controller, converts the data into the signaling of the mobile station, completes the encoding and decoding processing through the interconnected protocol stack of the interconnected base station controller, and finally sends the signaling scheduling processing based on the TETRA time slot to the interconnected transceiver through the signaling transceiver module of the interconnected base station controller;
and step 3: after receiving the data of the interconnected base station controller, the interconnected transceiver modulates and demodulates the data and then sends the data to the air interface.
In summary, the above is only a preferred application example of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A method for realizing interconnection and intercommunication of a digital cluster system is characterized by comprising the following steps:
(1) constructing inter-system interconnection equipment comprising an interconnection base station and an IMSC (inertial measurement System center); the interconnected base station comprises an interconnected base station controller and a plurality of interconnected transceivers;
(2) initializing an interconnected base station: the method comprises the steps that an interconnection base station controller obtains configuration information of transmitting and receiving frequency points and sends the configuration information to an interconnection transceiver when the configuration information is effective, the interconnection transceiver receives a TETRA standard air interface broadcast signaling message at the receiving frequency point, and the interconnection base station enters a working state after receiving the TETRA standard air interface broadcast signaling message;
(3) the interconnected base station performs air interface configuration, including an air interface sending process and an air interface receiving process;
the air interface sending process comprises: after entering a working state, the interconnection base station controller reads configured user related information, generates a user registration request signaling message when the configuration information is effective, and transmits the user registration request signaling message to an interconnection transceiver after coding and decoding, and the interconnection transceiver transmits the received signaling message to an opposite-end digital cluster base station through an air interface;
the air interface receiving process comprises the following steps: the interconnection transceiver receives an air interface message of an opposite terminal digital cluster base station and then sends the air interface message to an interconnection base station controller, the interconnection base station controller decodes the air interface message and detects the validity of the air interface message, if the air interface message is valid, the interconnection transceiver encodes the air interface message and then sends the air interface message to an IMSC (inertial measurement System); otherwise, continuing to wait for receiving the air interface message;
(4) after the air interface configuration of the interconnected base station is finished, the interconnected base station and an IMSC (inertial measurement System) switching center jointly finish data forwarding between different digital trunking base stations, including uplink data forwarding and downlink data forwarding;
the uplink data forwarding process comprises the following steps: after receiving data from the air interface, the interconnection transceiver modulates and demodulates the air interface data, and then sends the data to the interconnection base station controller, and the interconnection base station controller carries out signaling scheduling, coding and signaling conversion on the data and then carries out switching processing by an IMSC (integrated multimedia subsystem) switching center;
the downlink data forwarding process comprises the following steps: the IMSC sends the received signaling to an interconnection base station controller, the interconnection base station controller encodes the signaling, converts the signaling, then sends the signaling to an interconnection transceiver based on the signaling scheduling processing of the TETRA time slot, and the interconnection transceiver modulates and demodulates the data and then sends the data to an air interface.
2. The method for implementing interconnection and interworking of digital trunking systems according to claim 1, wherein the step (2) comprises the steps of:
(201) a signaling transceiver module of an interconnection base station controller acquires configuration information of transmitting and receiving frequency points, detects whether the configuration information is valid, if the configuration information is invalid, the interconnection base station is in a standby state, and if the configuration information is valid, the configuration information is sent to an interconnection transceiver; the transmitting frequency point of the interconnected base station is the receiving frequency point of the opposite-end digital trunking base station, and the receiving frequency point of the interconnected base station is the transmitting frequency point of the opposite-end digital trunking base station;
(202) the interconnected transceiver enters a working state after receiving the configuration information, and detects whether a TETRA standard air interface broadcast signaling message is received at a receiving frequency point; if the air interface broadcast signaling of the TETRA standard is not received, the interconnected base station is in a standby state, and if the air interface broadcast signaling of the TETRA standard is received, the interconnected base station is in a working state and sends an indication of entering the working state to a signaling protocol conversion module of an interconnected base station controller.
3. The method for implementing interconnection and interworking of digital trunking systems according to claim 1, wherein the air interface transmission procedure of step (3) comprises the following steps:
(301) after the interconnected base station enters a working state, a signaling protocol conversion module of an interconnected base station controller reads configured user related information;
(302) the signaling protocol conversion module checks the validity of the configuration data, if the configuration data is invalid, the initial interconnected base station state is the configuration state, and if the configuration data is valid, a user registration request signaling message is sent to an interconnected protocol stack of an interconnected base station controller;
(303) the interconnection protocol stack receives a user registration request signaling message sent by the signaling protocol conversion module and then carries out coding and decoding, and the coded and decoded message is sent to an interconnection transceiver through a signaling transceiver module of an interconnection base station controller;
(304) the interconnection transceiver sends the received signaling message to the opposite-end digital cluster base station through an air interface; if the air interface message is failed to be sent, an error report instruction is sent to the signaling protocol conversion module, and if the air interface message is successfully sent, a success report instruction is sent to the signaling protocol conversion module.
4. The method according to claim 3, wherein the air interface receiving procedure in step (3) includes the following steps:
(401) after receiving an air interface message of an opposite terminal digital cluster base station, the interconnection transceiver sends the air interface message to a signaling transceiver module of an interconnection base station controller;
(402) the signaling transceiver module receives the air interface message of the interconnected transceiver, modulates and demodulates the air interface message, and then sends the air interface message to an interconnected protocol stack of an interconnected base station controller;
(403) the interconnection protocol stack decodes the air interface message, if the interconnection protocol stack decoding fails, the interconnection protocol stack continues to wait for receiving the air interface message, and if the interconnection protocol stack decoding succeeds, the decoded message is sent to a signaling protocol conversion module of the interconnection base station controller;
(404) the signaling protocol conversion module checks whether the message is valid; if the message is invalid, continuing to wait for receiving an air interface message; if the signaling protocol conversion module checks that the message is valid, the signaling protocol conversion module sends the message to a base station side protocol stack of the interconnected base station controller;
(405) after receiving the message of the signaling protocol conversion module, the protocol stack at the base station side encodes the message and sends the encoded message to the IMSC.
5. The method of claim 1, wherein the uplink data forwarding process in step (4) comprises the following steps:
(501) after receiving data from the air interface, the interconnection transceiver modulates and demodulates the air interface data, judges the effectiveness of the data and then sends the data to a signaling transceiver module of an interconnection base station controller;
(502) the signaling transceiver module carries out signaling scheduling processing based on TETRA time slot on air interface data, then sends the air interface data to an interconnection protocol stack of an interconnection base station controller for coding and decoding processing, the coded and decoded data carries out signaling conversion through a signaling protocol conversion module of the interconnection base station controller, converts the signaling of an uplink mobile station into base station side signaling and sends the base station side signaling to the base station side protocol stack of the interconnection base station controller;
(503) the protocol stack at the base station side encodes the data and then sends the data to the IMSC switching center, and the IMSC switching center performs signaling switching processing on the uplink data.
6. The method according to claim 5, wherein the downlink data forwarding process in step (4) includes the following steps:
(601) the IMSC carries out switching processing on the signaling, and then sends the signaling to a base station side protocol stack of the interconnected base station controller;
(602) the base station side protocol stack encodes the data, completes the conversion of the base station side signaling through the signaling conversion module of the interconnected base station controller, converts the data into the signaling of the mobile station, completes the encoding and decoding processing through the interconnected protocol stack of the interconnected base station controller, and finally sends the signaling scheduling processing based on the TETRA time slot to the interconnected transceiver through the signaling transceiver module of the interconnected base station controller;
(603) after receiving the data of the interconnected base station controller, the interconnected transceiver modulates and demodulates the data and then sends the data to the air interface.
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