CN106533888B - Realize the gateway that Digital Clustering interconnects - Google Patents
Realize the gateway that Digital Clustering interconnects Download PDFInfo
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- CN106533888B CN106533888B CN201611249473.0A CN201611249473A CN106533888B CN 106533888 B CN106533888 B CN 106533888B CN 201611249473 A CN201611249473 A CN 201611249473A CN 106533888 B CN106533888 B CN 106533888B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4604—LAN interconnection over a backbone network, e.g. Internet, Frame Relay
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/66—Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4604—LAN interconnection over a backbone network, e.g. Internet, Frame Relay
- H04L2012/4629—LAN interconnection over a backbone network, e.g. Internet, Frame Relay using multilayer switching, e.g. layer 3 switching
Abstract
The present invention relates to the gateways for realizing that Digital Clustering interconnects.It is characterized by comprising GC and TR, GC connects TR by Ethernet interface, and TR includes vehicle-mounted RX terminal and vehicle-mounted TX terminal, one vehicle-mounted RX terminal and a vehicle-mounted TX terminal combinations are at a backward channel machine, wherein, vehicle-mounted RX terminal is for receiving signal, and vehicle-mounted TX terminal is for sending signal.In the cluster communication market to become increasingly complex, in order to maximized and most economical using existing system resource, there is an urgent need to such intercommunication gateway equipments for connecting the intercommunication between intercommunication and different systems system between different producer's systems.Gateway proposed by the present invention can the very good solution above problem, and can simultaneously utilize N number of channel carry out interworking service.
Description
Technical field
The present invention relates to a kind of gateways realizing Digital Clustering and interconnecting.
Background technique
Mobile communication system can be divided into public access mobile radio and dedicated mobile communications subsystem by its character of use.Collection
Group communication system belongs to dedicated mobile communications subsystem, it is a kind of shared resource, contribution, shared channel equipment and service
Multipurpose, dynamical wireless dispatching communication system.
In network topology structure, trunked communication system has composition similar with public access mobile radio: terminal is logical
Cross air interface and base station communication；Each base station is all connected to one by the different sons such as function of exchange, management function, scheduling feature
The switching control center of system composition；The prior network planning determines geographical addressing and the running parameter of each base station, thus
It is built into the region overlay of cellular cell.
TETRA standard defines the air interface communication agreement of trunked communication system, the i.e. association of base station and terminal room communication
It assesses a bid for tender standard, in actual use, the terminal of different manufacturers and base station substantially can be compatible.TETRA standard also defines system
Interface intercommunication, i.e. agreement between different manufacturers switching centre.But on actual market, in order to protect oneself domain, resistance
Only rival factory enters, and the producer being introduced into often is reluctant that cooperation carries out debugging of interconnecting, therefore to realize across the mutual of producer
Joining intercommunication is still a problem.
Existing Interworking gateway is to access peer-to-peer system by a digital ride, is exhaled with realization group in back-to-back fashion
Intercommunication.Cluster communication cannot develop as Cellular Networks, although there is many external factor, its own technology development there is also
Bottleneck, wherein most serious is exactly the problem of interconnecting.Including the intercommunication between not homologous ray, base station and switching centre it
Between intercommunication or even the intercommunications of consolidated network different terminals be all problem.
Intercommunication mode is mainly embedded into peer-to-peer system realization intercommunication by digital ride between system currently on the market.Insertion
The intercommunication mode of digital ride can only realize that group is exhaled, and a ride can only be supported to call all the way simultaneously.But the demand of user is past
It further include individual calling, the interworking services such as short data toward not only being exhaled comprising group.Obviously it is difficult to meet by existing mode growing
Intercommunication demand.According to this market demand, there is an urgent need to realize a novel gateway, it can be adapted to for greater flexibility
The environment of peer-to-peer system, and build conveniently, multiway calling can be supported simultaneously, moreover it is possible to it is mutual to solve individual calling and short data between system
Logical problem.
Summary of the invention
Aiming at the problems existing in the prior art, it is an object of the invention to propose that a kind of realization Digital Clustering interconnects
Gateway technical solution.
The gateway that the realization Digital Clustering interconnects, it is characterised in that including GC and TR, GC passes through ether
Network interface connects TR, and TR includes vehicle-mounted RX terminal and vehicle-mounted TX terminal, a vehicle-mounted RX terminal and a vehicle-mounted TX terminal combinations
At a backward channel machine, wherein vehicle-mounted RX terminal is for receiving signal, and vehicle-mounted TX terminal is for sending signal.
The gateway that the realization Digital Clustering interconnects, it is characterised in that the vehicle-mounted TX terminal passes through ether
Network interface is connect with GC.
The gateway that the realization Digital Clustering interconnects, it is characterised in that the vehicle-mounted RX terminal includes first
LMAC layers and the first PHY layer, the vehicle-mounted TX terminal includes LLC layer, UMAC layers, the 2nd LMAC layers and the second PHY layer.
The gateway that the realization Digital Clustering interconnects, it is characterised in that the GC include interface layer, CC layers,
SDS layers, MM layers and MLE layers.
The gateway that the realization Digital Clustering interconnects, it is characterised in that MM layers described, CC layers and SDS layers
It is communicated upwardly through interface layer with BCC, passes downwardly through MLE layers and communicated with TR；Described MLE layers upwards support MM layers, CC layers with
And SDS layers of business demand, it is communicated with TR downwards；The LLC layer is communicated with MLE layers upwards, is communicated with UMAC layers downwards；It is described
UMAC layers communicate with LLC layer and MLE layers upwards, downwards with the first LMAC layers and the 2nd LMAC layers communicate；Described second
LMAC layers communicate with UMAC layers upwards, communicate with the second PHY layer downwards；Described first LMAC layers communicated upwards with UMAC layers, to
It is lower to be communicated with the first PHY layer.
The gateway realizes method that Digital Clustering interconnects, it is characterised in that its operational process is as follows:
1) be switched on standby process:
A. after gateway booting, MLE layers immediately to respectively the normal TR configuration work frequency point of line, each TR are opened therewith
Oneself scanning process is started from, gateway is in standby；
B. gateway in the standby state, the MLE layers of scanning result for receiving each TR, if scanning result is normal and is
That main carrier TR is reported as a result, main carrier TR is scanned successfully, gateway enters state of activation, and MLE layers are reported to BCC and currently may be used
The number of channel；If it is other scanning results, GC only updates the currently available number of channel, is still within standby mode；
C. gateway is active, and gateway opens the interconnected passages with BCC, is started and peer-to-peer system side
It eats dishes without rice or wine to access between boundary base station；The MLE layers of operation irregularity for once receiving some TR are then updated if not main carrier TR
The number of channel and it is reported to BCC；If it is main carrier TR, gateway enters standby mode, closes the interconnected passages with BCC, stops
Only eat dishes without rice or wine to access between peer-to-peer system border base station；
2) TR scanning process:
First LMAC layers and the 2nd LMAC layers after receiving UMAC layers of scan request command, become reception state,
The BSCH for starting capture border base station, when the first LMAC layers and the 2nd LMAC layers of local radio frequency ginseng being completed to border base station
Clock alignment is examined, that is, after completing AFC, UMAC layers to the first LMAC layers and the 2nd LMAC layer configuration synchronization message and scrambling code letter
Then breath starts the BNCH for parsing border base station；
3) exception management:
The exception management of gateway is mainly completed by MLE layers and UMAC layers, is responsible for for UMAC layers counting following several different
It is normal: abnormal, downlink reception exception, main carrier switching, boundary base are connected to the network between the vehicle-mounted RX terminal and vehicle-mounted TX terminal of TR
The vehicle-mounted RX terminal into single station or cluster mode, TR of standing loses synchronous and TR vehicle-mounted RX terminal and side with vehicle-mounted TX terminal
Boundary base station loses synchronization.
In the cluster communication market to become increasingly complex, in order to it is maximized and it is most economical utilize existing system money
Source is used to connect intercommunication and the different systems between different producer's systems there is an urgent need to such intercommunication gateway equipment
Intercommunication between (PDT and TETRA) system.The intercommunication mode of an original back-to-back Vehicle mounted station can only utilize a letter simultaneously
Road, this is the significant wastage to system resource, and is also far from satisfying the demand of business intercommunication.Gateway proposed by the present invention is set
It is standby can the very good solution above problem, and interworking service can be carried out using N number of channel simultaneously (N is equal to opposite end base station
All carrier channel numbers currently worked normally).
Detailed description of the invention
Fig. 1 is bridge system networking schematic diagram；
Fig. 2 is gateway hardware structural diagram；
Fig. 3 is gateway software configuration diagram；
Fig. 4 is TETRA terminal protocol stack；
Fig. 5 is gateway Booting sequence figure；
Fig. 6 is gateway activation process figure；
Fig. 7 is the standby flow chart of gateway；
Fig. 8 is TR scanning process figure；
Fig. 9 is each layer slot count on TR；
Figure 10 is the state base of UMAC slot synchronization.
Specific embodiment
It elaborates with reference to the accompanying drawing to the present invention.
Explanation of nouns:
MS:Mobile Station, mobile station；
BS:Base Station, base station；
TETRA:Trans European Trunked Radio, pan-European trunked radio；
Peer-to-peer system: i.e. original system, it is desirable to the system being interconnected；
This end system: the system being newly added, it is desirable to the system interconnected with peer-to-peer system；
BCC:Bridging Control Center bridges center；
GD:Gateway Device, gateway；
Bridge system: for the system for realizing two different manufacturers digital cluster system intercommunications, by a BCC and several
GD is constituted；
Border base station: being used in peer-to-peer system and the base station of this end system interconnection, radio network gateway pass through standard
TETRA air interface protocol accesses therewith；
Working frequency points are configured to the TR of opposite end base station main carrier frequency point in main carrier TR:GD, the vehicle-mounted TX terminal in TR
Downlink frequency point of the vehicle-mounted RX terminal works to work in the uplink frequency point of main carrier, TR in main carrier；
Vehicle-mounted RX terminal: it is used to do the car-mounted terminal of downlink reception in TR；
Vehicle-mounted TX terminal: it is used to do the car-mounted terminal of uplink transmission in TR；
BSC:Base Station Control, base station controller；
BSR:Base Station Receiver, base station transceiver channel machine, a base station is by+n BSR groups of 1 BSC
At；
GC:Gateway Controller, gateway controller；
TR:Transmitter and Receiver, transceiver；
MLE:Mobile Link Entity, mobile link entity；
LLC:Logical Link Control, logic link control；
MM:Mobility Management, mobile management；
CC:Call Control, Call- Control1；
SDS:Short Data Service, short data service；
MAC:Media Access Control, media access control；
UMAC:Upper Media Access Control, upper MAC；
LMAC:Lower Media Access Control, lower MAC；
PHY layer: physical layer, physical layer；
MNI:Mobile Network Identity, mobile network's identity；
BNCH:Broadcast Network Channel, network broadcast channel；
BSCH:Broadcast Synchronization Channel, synchronized broadcast channel；
AFC:automatic frequency control, automatic frequency control are used to further indicate that herein automatic
Correct local radio frequency reference clock capability；
PDT:Police Digital Trunking, police Digital Clustering；
Call id:call identifier is used in air protocol identify certain call business all the way；
Colour coding: 6bit data are present in the BSCH of BS；
Scrambling code: the colour coding of extension, for scrambling Descrambling logic channel, total 30bit, by MNI(24bit) and connection colour coding
(6bit) composition；
Slot count: M (multi-frame), F(frame number), S (time slot) is indicated with array { M, F, S }, according to air protocol, one
Frame is equal to 4 time slots, and a multi-frame is equal to 18 frames, and the counting of time slot moves in circles from 1 to 4, and every circulation primary, frame number adds one.
Frame count moves in circles from 1 to 18, every circulation primary, multi-frame number plus one.Multi-frame counting moves in circles from 1 to 60.Slot count
It is started counting from { 1,1,1 }, is added to { 60,18,4 }, then revert to { 1,1,1 }, moved in circles.1 reframing time is approximately equal to 1
Second；In PHY layer only with F(frame number), S (time slot) is counted, and eliminates multi-frame；
Slot count relationship: describe for convenience various slot counts (UMAC layers, LMAC layers, PHY layer and base station BS CH
In slot count) relationship, multiple slot counts are associated.Such as { M, F, S, fn, sn }.
Intercommunication of the bridge system for realizing two different manufacturers digital cluster systems, the composition of this system such as Fig. 1 institute
Show mainly there are several wireless gateway devices and bridge joint center to constitute, radio network gateway is used to realize the border base station with peer-to-peer system
Between eat dishes without rice or wine connect, bridge joint center is then realized and the connection of the switching centre of this end system and the pipe to multiple gateways
Reason carrys out interworking service to be optimal the suitable gateway of selection.
Wireless gateway device is communicated in accordance between TETRA air interface protocol and peer-to-peer system completely, in opposite end system
Apparently, this wireless gateway device those of represents in this end system true like the MS of several virtual presences for the base station of system
MS access peer-to-peer system.Gateway will be maintained with all business that peer-to-peer system is established, and by report to bridge system
In bridge joint center, then this is linked by bridge joint center processing and is the switching centre of end system, to find under respective base station
That true MS.In Fig. 1, some hand platform An of this end system wants to communicate with some Bn hand platform under peer-to-peer system, bridge
Welding system can distribute a virtual number An ' and initiate register flow path to peer-to-peer system, and bridge joint center is configured based on some number homes
And the strategies such as congestion control, can some base station BS n by An ' choosing from from some gateway GDn to peer-to-peer system initiate registration
The signalling interworking of process, next An and Bn just transmit between BSn, GDn, BCC and the switching centre of both sides, certainly also
The base station BS a and BSb respectively registered including An and Bn.Each of bridge system gateway corresponds to the one of peer-to-peer system
A border base station, each gateway can be according to the configuring condition flexible arrangements of peer-to-peer system border base station, but in system
The working method of each gateway is the same.
Gateway in bridge system is to be communicated by simulating the business of terminal with peer-to-peer system, therefore, gateway
Channel device need and peer-to-peer system border base station channel device correspond.It, can be complete according to traditional base station function mode
The hardware structure of full ginseng base station builds hardware device a set of in this way, contains+n BSR of 1 BSC, these BSR corresponding sides
Each BSR of boundary base station realizes the signaling receiving and transmission to boundary base station BS R.But the shortcomings that this mode, is as follows:
1, the hardware device of base station involves great expense, and volume is larger；
2, a full set of software for developing BSC and BSR needs exploitation of starting from scratch.
Gateway of the invention includes GC and TR, and TR includes vehicle-mounted RX terminal and vehicle-mounted TX terminal, and a vehicle-mounted RX is whole
End and a vehicle-mounted TX terminal combinations are at a backward channel machine, wherein vehicle-mounted RX terminal is for receiving signal, vehicle-mounted TX terminal
For sending signal, the vehicle-mounted TX terminal is connect by Ethernet interface with GC.The vehicle-mounted RX terminal includes the first LMAC
Layer and the first PHY layer, the vehicle-mounted TX terminal includes LLC layer, UMAC layers, the 2nd LMAC layers and the second PHY layer, and the GC includes
Interface layer, CC layers, SDS layers, MM layers and MLE layers, MM layers described, CC layers and SDS layers is logical upwardly through interface layer and BCC
Letter, passes downwardly through MLE layers and communicates with TR；Described MLE layers MM layer, CC layer and SDS layers of business demand of support upwards, it is downward with
TR communication；The LLC layer is communicated with MLE layers upwards, is communicated with UMAC layers downwards；Described UMAC layers upwards with LLC layer and MLE
Layer communication, downwards with the first LMAC layers and the 2nd LMAC layers communicate；Described 2nd LMAC layers communicated upwards with UMAC layers, downwards
It is communicated with the second PHY layer；Described first LMAC layers communicated upwards with UMAC layers, communicated with the first PHY layer downwards.
Since Vehicle mounted station belongs to terminal type, full duplex work cannot achieve, each Vehicle mounted station can only be realized all the way simultaneously
The reception or transmitting of frequency point, therefore a full duplex transceiver, one of Vehicle mounted station (figure are formed using two trolley microscope carriers
Vehicle-mounted RX terminal in 2) working frequency be set as the downstream frequency of some channel device of peer-to-peer system border base station, for receive from
The signal that this BTS channel machine issues, another Vehicle mounted station (the vehicle-mounted TX terminal in Fig. 2) working frequency are set as peer-to-peer system side
Boundary base station is used to emit signal to this BTS channel machine with the upstream frequency of channel device.Such as with the border base station of 4 carrier waves
Interconnection needs 8 Vehicle mounted stations (4 receive 4 hairs) to realize full-duplex communication.
The operation law of gateway of the present invention will substantially follow the TETRA terminal protocol framework in Fig. 4.Gateway
Protocol hierarchy as shown in figure 3, protocol hierarchy includes layer 1, layer 2 and layer 3, layer 3 is placed on GC, because of the operation layer needle of layer 3
To all TR, need to keep communicating with each TR.The function mode of layer 2 is placed on for each carrier wave (frequency point)
On each TR, the digital link of LLC layer and UMAC layer responsible terminal in layer 2 and the transmitting-receiving control on logic channel, only using will
It is placed on a Vehicle mounted station, it is contemplated that the real-time of terminal transmission, place it in as launch channel machine that
On a car-mounted terminal (the vehicle-mounted TX terminal in Fig. 2), data pending in this way can launch in time, and it is whole not need vehicle-mounted RX
It holds toward the straddle message transmission between vehicle-mounted TX terminal.Layer 2 in LMAC layer due between PHY layer interact real-time more
Height, and there are a large amount of data encoding and decoding processing, (vehicle-mounted TX terminal and vehicle in Fig. 2 are split on two car-mounted terminals
Carry RX terminal), for realizing the control to physical channel.The PHY layer of layer 1 is distributed in each car-mounted terminal (vehicle-mounted TX in Fig. 2
Terminal and vehicle-mounted RX terminal).In addition, increasing by the interface layer of one with BCC communication on GC, the signalling interworking with BCC is realized.
Gateway can regard the carrier of several virtual terminals as in fact, and operation law is similar to a car-mounted terminal
The method of operation, therefore gateway protocal layers need the protocol layer to TETRA terminal to do multiplexing process and increase some pipes
Manage function.The implementation method of each protocol layer is described in detail below.
(1) MM layers
As shown in the gateway architecture of Fig. 3, MM layers are located in GC, communicate upwardly through interface layer with BCC, pass downwardly through MLE
Layer is communicated with TR, the MM layers of registration only remained in former TETRA terminal MM layer protocol and group attachment flow.Since BCC has
The function of virtual-number is configured between multiple GD, therefore registration request is to be initiated by BCC, and eat dishes without rice or wine to infuse by the completion of the MM of GD layer
Volume and group attachment flow.The registration request that opposite end base station is actively initiated, is reported to BCC by MM layers, BCC decides whether to end group
Initiation of standing is registered.
(2) CC layers
As shown in the gateway architecture in Fig. 3, CC layers are located in GC, communicate, pass downwardly through with BCC upwardly through interface layer
MLE layers communicate with TR, and former TETRA terminal protocol only supports the call business to single terminal, now establish one according to number
Chained list is called, each chained list node stores each number call information and call state machine.It is not associated between each number,
Independently of one another, so the message to upper layer and to lower layer, which enters, is lined up transmitting in the message queue between protocol layer.All transmitting
To CC layers of call signaling, according to call id and number index chained list node, call state machine terminates to be automatically deleted chained list section
Point.
(3) SDS layers
As shown in the gateway architecture in Fig. 3, SDS layers are located in GC, communicate, pass downwardly through with BCC upwardly through interface layer
MLE layers communicate with TR, and former TETRA terminal protocol only supports the short message service to single terminal, now establish one according to number
Business chained list, each chained list node store the short message state machine of each number.It is not associated between each number, independently of one another,
So the message to upper layer and to lower layer, which enters, is lined up transmitting in the message queue between protocol layer.It is all to be transmitted to SDS layers
Signaling, according to number and reference index chained list node, short message receiving-transmitting completion is automatically deleted chained list node.
(4) MLE layers
As shown in the gateway architecture in Fig. 3, MLE layers are located in GC, upwards the business of MM layers, CC layers and SDS layers of support
Demand is communicated with TR downwards.MLE layers only remain the access function of former TETRA terminal protocol layer 3 (i.e. by protocol realization MLE
The codec functions of layer).In addition distinctive veneer management function is increased, including the maintenance GD described in standby process that is switched on
It is standby and activation two states, be responsible for BCC reporting channel resource.In addition it is also responsible for forwarding upper layer to different TR for MLE layers
The message of service request (MM layers, SDS layers, CC layers).MM layers of service request be main carrier TR to be sent to LLC layer, SDS layers and
CC layers of service request is the LLC layer for needing to be sent to different TR according to channel type decision.
(5) LLC layer
As shown in the gateway architecture in Fig. 3, LLC is located in vehicle-mounted TX terminal, communicates upwards with MLE layers, downwards and UMAC
Layer communication, the LLC layer of GD only support basic link business, and High Level Link is not supported.Former TETRA terminal protocol is only supported to single
The basic link business of terminal, only a link, and a link chained list is now established according to each Subscriber Number here, root
According to the corresponding link chained list node of number searching.
(6) UMAC layers
As shown in the gateway architecture in Fig. 3, UMAC layers are located in vehicle-mounted TX terminal, logical with LLC layer and MLE layers upwards
Letter, downwards with the first LMAC layers and the 2nd LMAC layers communicate.UMAC layers are supported the letter referred in TETRA terminal UMAC layer protocol
Road maintenance sends and receives function with uplink and downlink data.In addition scanning function and the TR plate for increasing TR working frequency points are abnormal
Management function.Since GD each time slot is likely in transmitting and each descending time slot requires to receive, it is therefore desirable to
It builds four receiving queues and four transmit queues, queue number is corresponding with timeslot number.The downstream message of all addresses of downlink reception.
For each number, channel information locating for each number does not save channel maintenance function at UMAC layers, and one
Restrain the operation layer (CC layers, MM layers and SDS layers) for following the signaling of the number to be uploaded to layer 3.Operation layer in the signaling issued all
Understand the channel information with oneself.MLE layers, according to this channel information, send traffic signaling to the LLC layer of corresponding TR.
(7) LMAC layers
As shown in the gateway architecture in Fig. 3, LMAC layers (vehicle-mounted RX terminal and vehicle-mounted TX are whole in two Vehicle mounted stations of TR
End) on, vehicle-mounted RX terminal the first LMAC layer be constantly in reception pattern, receive all downlink datas, be reported to vehicle-mounted TX end
UMAC layer on end, the 2nd LMAC layers of uplink transmission that takes charge of of vehicle-mounted TX terminal.
(8) PHY layer
As shown in the gateway architecture in Fig. 3, PHY layer is in two Vehicle mounted stations (vehicle-mounted RX terminal and vehicle-mounted TX terminal)
On, with the PHY layer of single ride in basic function.In addition, choosing is whole by vehicle-mounted RX in order to realize that the when base of two Vehicle mounted stations is synchronous
It holds and interrupts (vehicle-mounted RX end to vehicle-mounted TX terminal output time reference (TDMA device end is synchronous with the when base between system) and multiframe
The first PHY layer slot count at end just exports one every 18 frames and interrupts to vehicle-mounted the second PHY layer of TX terminal).
A method of realizing that Digital Clustering interconnects using gateway of the invention, it is characterised in that it runs
Method is as follows:
1) be switched on standby process:
A. as shown in figure 5, after gateway booting, MLE layer immediately to respectively the normal TR configuration work of line is frequently therewith
Point, each TR start the scanning process of oneself, and gateway is in standby；
B. as shown in fig. 6, gateway in the standby state, the MLE layers of scanning result for receiving each TR, if scanning knot
Fruit is normal and is main carrier TR, and main carrier TR is scanned successfully, and gateway enters state of activation, and MLE layers are reported to BCC and currently may be used
The number of channel；If it is other scanning results, GC only updates the currently available number of channel, is still within standby mode；
C. as shown in fig. 7, gateway is active, gateway open with the interconnected passages of BCC, start with
It eats dishes without rice or wine to access between peer-to-peer system border base station；MLE layers once receive the operation irregularity of some TR, if not main carrier
TR then updates the number of channel and is reported to BCC；If it is main carrier TR, gateway enters standby mode, closes mutual with BCC
Circulation passage stops eating dishes without rice or wine to access between peer-to-peer system border base station.
The BSR carrier wave of the frequency point and peer-to-peer system border base station of each TR work in gateway is one-to-one, wherein
Certainly exist a TR corresponding with main carrier frequency point, referred to as main carrier TR(one of them be configured to main carrier work frequency
The TR of point).For a terminal, if to initiate to register to base station, it is necessary to first complete scanning process, frequency point will be scanned
It is arranged to the main carrier frequency point of the base station, in gateway, main carrier TR plate then also needs to complete such scanning process.
Main carrier TR is scanned successfully, this intercommunication gateway equipment has just opened the intercommunications of two systems at last, and (all control signalings are all
Being will be in main carrier channel transfer).Remaining other several traffic carrier TR respectively work on traffic carrier frequency point (with boundary
The traffic carrier of base station corresponds).After these traffic carriers TR is completed to the scanning process in oneself working frequency points, it will locate
In state of activation, the number of channel of two systems intercommunication will be greatly increased.In general, these traffic carriers TR almost can be with main load
Wave TR is completed at the same time the scanning of corresponding frequency point.
2) TR scanning process:
First LMAC layers and the 2nd LMAC layers after receiving UMAC layers of scan request command, become reception state,
The BSCH for starting capture border base station, when the first LMAC layers and the 2nd LMAC layers of local radio frequency reference all completed to border base station
After clock alignment, that is, after completing AFC, UMAC layers to the first LMAC layers and the 2nd LMAC layers of configuration synchronization message and scrambling code,
Then start the BNCH of parsing border base station.It is described below in detail.
TR device power-up starts, and the vehicle-mounted RX terminal in TR exports time reference to the vehicle-mounted TX terminal in TR, vehicle-mounted
First LMAC layers and vehicle-mounted TX terminal of RX terminal the 2nd LMAC layers apparently, in the time slot engraved when exactly possessing same
It is disconnected.The first PHY layer of vehicle-mounted RX terminal just has oneself slot count: fn1(frame from booting in Fig. 8), sn1(time slot)；It is vehicle-mounted
The second PHY layer in TX terminal also has the slot count of oneself: fn2 (frame), sn2(time slot).Have between two car-mounted terminals a
Connection breaking (every 18 frame will export once) in multiframe, that is, as fn1=1 in the first PHY layer of vehicle-mounted RX terminal, sn1=
When 1, the counting of oneself is also adjusted to fn2=1, sn2=1 simultaneously in the second PHY layer of vehicle-mounted TX terminal.Due to two it is vehicle-mounted
The when base of terminal is consistent (time that each time slot starts), therefore from starting up, at most a multiframe time (more than one
Frame is equal to 18 frames, and the time is approximately equal to one second) after, two car-mounted terminals have been able to ensure that local slot count is consistent, it may be assumed that
Fn1=fn2, and sn1=sn2.
Vehicle-mounted RX terminal the first LMAC layers receive the first PHY layer transmission first time slot interrupt after (at one
In gap) and vehicle-mounted TX terminal the 2nd LMAC layers receive the second PHY layer transmission first time slot interrupt after (at one
In gap), the LMAC layers of slot count for having begun to oneself: M (multi-frame), F(frame number), S (time slot), with array { M, F, S } table
Show.This slot count by with the fn of PHY layer (frame), sn(time slot) composition one group of data, with array { M, F, S, fn, sn } table
Show, referred to as set of time-slot counts relationship.First LMAC layers of this group of slot count relationship of vehicle-mounted RX terminal be exactly M1, F1,
S1, fn1, sn1 }, the 2nd LMAC layers of this group of slot count relationship of vehicle-mounted TX terminal is exactly { M2, F2, S2, fn2, sn2 }.
Vehicle-mounted RX terminal receives each downstream message of base station, for this descending time slot, the first LMAC layers have oneself
Slot count relationship { M1, F1, S1, fn1, sn1 } sends jointly to UMAC together with the downstream message content of decoded base station
Layer, if this downstream message includes the BSCH of base station, UMAC layers can solve base station at the downstream message moment from BSCH
Descending time slot counts BS_M (frame), BS_F (frame number) and BS_S(timeslot number), i.e. BSCH slot count { BS_M, BS_F, BS_S }.
This group of slot count composition of relations { M1, F1, S1, fn1, sn1, BS_M, BS_F, BS_S } is informed the first LMAC layers by UMAC layers
With the 2nd LMAC layers, this informing process is exactly to configure to synchronize described in Fig. 8.In addition LMAC layers of coding/decoding channels needs are disturbed
Code, scrambling code is made of colour coding and MNI information (providing in TETRA air interface protocol), and color code information comes from BSCH, MNI letter
Cease the configuration information from GD.UMAC layers scrambling code information is informed simultaneously the first LMAC layer with the 2nd LMAC layers, i.e. describe in Fig. 8
Configuration scrambling code.
When vehicle-mounted RX terminal the first LMAC layers receive this group of slot count composition of relations { M1, F1, S1, fn1, sn1, BS_
M, BS_F, BS_S } when, it is assumed that the first LMAC layers of slot count is { M1 ', F1 ', S1 ' }, and slot count relationship is
{M1′,F1′,S1′,fn1′,sn1′}。
{ M1, F1, S1 } in { M1 ', F1 ', S1 ' }-slot count relationship of LMAC layers of timeslot offset Δ S1=the first.
Here subtraction is meant that the timeslot offset calculated between two groups of slot counts.From the generation time, first
Contain BSCH in LMAC layer decoder to downstream message, { M1, F1, S1, fn1, sn1 } is sent to UMAC layers, then send out via UMAC layers
{ M1, F1, S1, fn1, sn1, BS_M, BS_F, BS_S } back, the first LMAC layers of slot count at the time of receiving this message
It is { M1 ', F1 ', S1 ' } that slot count relationship is { M1 ', F1 ', S1 ', fn1 ', sn1 ' }, and therefore { M1 ', F1 ', S1 ' } always exists
After { M1, F1, S1 }, { fn1 ', sn1 ' } differs less than several time slots and (transmits disappear between layers after { fn1, sn1 }
The time loss of breath).Δ S1 is more than or equal to 0.
Timeslot offset Δ S1 also can use the difference meter between { fn1 ', the sn1 ' } of the first PHY layer and { fn1, sn1 }
It calculates, with Δ S1 ' differentiation, it may be assumed that
Timeslot offset Δ S1 '={ fn1 ', sn1 ' }-{ fn1, sn1 }.
Since the first LMAC layers of slot count contains multi-frame information, deviation energy is calculated using the calculation formula of Δ S1
It is enough to calculate more than timeslot offset situations more than 18 frames (message transmission there are when Abnormal Blocking, more than one second, generally not
It can occur).
First LMAC layers need to increase to Δ S1 on counting relationship { BS_M, BS_F, BS_S }, come update oneself when
Gap counts { M1 〞, F1 〞, S1 〞 }:
{M1〞,F1〞,S1〞}=ΔS1+{BS_M,BS_F,BS_S}。
Here add operation, which is meant that be counted by { BS_M, BS_F, BS_S }, to be continued to be incremented by S1 time slot of Δ backward.
{ fn1 ', sn1 ' } value is generated by the first PHY layer of vehicle-mounted RX terminal, vehicle-mounted RX terminal the first LMAC layers not
Can change its value, thus the slot count relationship supplement of the first LMAC layers of vehicle-mounted RX terminal this moment for M1 〞, F1 〞, S1 〞, fn1 ',
sn1′}。
Vehicle-mounted TX terminal the 2nd LMAC layers receiving this group of slot count composition of relations { M1, F1, S1, fn1, sn1, BS_
M, BS_F, BS_S } when, it is assumed that its slot count at that time is { M2 ', F2 ', S2 ' }, slot count relationship be M2 ',
F2′,S2′,fn2′,sn2′}。
Car-mounted terminal RX the first LMAC layers receive BSCH and obtain { BS_M, BS_F, BS_S } at the time of, the first LMAC layers
Slot count relationship be { M1, F1, S1, fn1, sn1 }, the 2nd LMAC layers of slot count of the same moment vehicle-mounted TX terminal
Relationship is { M2, F2, S2, fn2, sn2 }.
Timeslot offset Δ S2={ fn2 ', sn2 ' }-{ fn2, sn2 }.
Here subtraction indicates the timeslot offset at two moment, the deviation of the two namely several time slots from the time
Difference (transmits the time loss of message) between layers, and Δ S2 is more than or equal to 0.The 2nd LMAC layers of vehicle-mounted TX terminal is not know
{ fn2, sn2 } value, but because of { fn1, sn1 }={ fn2, sn2 }, thus using slot count composition of relations M1, F1, S1,
Fn1, sn1, BS_M, BS_F, BS_S } obtained in { fn1, sn1 } can calculate:
Timeslot offset Δ S2={ fn2 ', sn2 ' }-{ fn1, sn1 },
Δ S2, which is added to, can be obtained the time slot meter of the 2nd LMAC layers of vehicle-mounted TX terminal on { BS_M, BS_F, BS_S }
Number { M2 〞, F2 〞, S2 〞 }, it may be assumed that
{ M2 〞, F2 〞, S2 〞 }=Δ S2+ { BS_M, BS_F, BS_S }.
Here add operation, which is meant that be counted by { BS_M, BS_F, BS_S }, to be continued to be incremented by S2 time slot of Δ backward.
{ fn2 ', sn2 ' } value be by vehicle-mounted TX terminal the second PHY layer generate, vehicle-mounted TX terminal the 2nd LMAC layers cannot
Change its value, therefore vehicle-mounted the 2nd LMAC layers of slot count this moment of TX terminal is updated to { M2 〞, F2 〞, S2 〞, fn2 ', sn2 ' }.
The synchronized relation of two car-mounted terminals is that following logical relation is utilized:
Multiframe interruption between first PHY layer of vehicle-mounted RX terminal and the second PHY layer of vehicle-mounted TX terminal ensure that time slot
Count the consistency of { fn, sn } in time, i.e., the same moment, { fn1, sn1 }={ fn2, sn2 }.
The slot count (BS_M (frame), BS_F (frame number), BS_S(timeslot number) and vehicle of down channel where the BSCH of base station
Carry RX terminal the first LMAC layers collect the consistency of the slot count (M1, F1, S1) of BSCH in time.
Vehicle-mounted RX terminal and vehicle-mounted TX terminal after completing AFC, each layer (LMAC layers and PHY layer) in two terminals with
And the descending time slot of base station keeps synchronous time slot to increase, i.e., at interval of same time, slot count adds 1.
The description of protocal layers slot count is detailed in Fig. 9 in terminal.
UMAC layers devise three synchronous regimes to control entire synchronizing process, are respectively: WAIT_SYNC, SYNC_
CONFIG,RX_SYNC.As shown in Figure 10, the beginning synchronous regime of scanning process is WAIT_SYNC, when UMAC layers to vehicle-mounted RX
First LMAC layers and vehicle-mounted TX terminal of terminal the 2nd LMAC layer sent synchronization message (include slot count relationship M1,
F1, S1, fn1, sn1, BS_M, BS_F, BS_S } and scrambling code) after, after synchronous regime is becomes SYNC_CONFIG, until
Meet be received again by BSCH BS_M, BS_F, BS_S) and be equal to LMAC layers of current RX terminal { M1, F1, S1 } (i.e. BS_M=
M1, and BS_F=F1, and BS_S=S1), then it is assumed that synchronous process is completed, update synchronous regime is RX_SYNC.
In order to avoid frequently configuring synchronization message, if after synchronous regime becomes SYNC_CONFIG, a continuous multiframe
(18 frame) synchronous regime does not become RX_SYNC still, then synchronous regime is retracted as WAIT_SYNC, restarts synchronous process.
3) exception management:
The exception management of gateway is mainly completed by MLE layers and UMAC layers, is responsible for for UMAC layers counting following several different
It is normal: abnormal, downlink reception exception, main carrier switching, boundary base are connected to the network between the vehicle-mounted RX terminal and vehicle-mounted TX terminal of TR
The vehicle-mounted RX terminal into single station or cluster mode, TR of standing loses synchronous and TR vehicle-mounted RX terminal and side with vehicle-mounted TX terminal
Boundary base station loses synchronization.
1, it is connected to the network between the vehicle-mounted RX terminal and vehicle-mounted TX terminal of TR abnormal
There is only a physical connections before vehicle-mounted RX terminal and vehicle-mounted TX terminal, are connected to the network exception when between the two,
Then entire TR be in can not working condition.
2, downlink reception is abnormal
Each TR has the working frequency points of oneself, on the down channel of oneself, once downlink reception exception occurs, then means
Opposite end base station downlink there are the vehicle-mounted RX terminal in exception or TR exist it is abnormal.Judgment method uses TETRA terminal protocol
In RDC counting method, it may be assumed that
A downlink reception exception occurs, counts RDC_Count as follows:
RDC_Count =RDC_Count - N_Value * N210；
Here N_Value and N210 refers to value N_Value=4 and N210=4 according to TETRA terminal protocol, still
The TR downlink reception of GD is that all down channels all receive, and that is to say that four time slots of a frame are completely in reception state, without
It is that a frame only works over a slot as single terminal.Therefore, N210 value is tuned into 1 here.
The initial value InitialRDC of RDC_Count is with describing in TETRA terminal protocol:
InitialRDC =RADIO_DOWNLINK_TIMEOUT * 144；
Wherein BNCH of the RADIO_DOWNLINK_TIMEOUT from opposite end base station；
When downlink reception is normal, if adjusting RDC_Count as follows:
RDC_Count = RDC_Count + N_Value；
RDC_Count after increase is no more than initial value InitialRDC size；
If RDC_Count is less than or equal to 0, then it is assumed that downlink occurs abnormal.
3, main carrier switches
Each TR can receive the BNCH of border base station, when discovery BNCH main carrier frequency point and GD record it is inconsistent
When, it is believed that the main carrier frequency point of border base station is replaced, and needs to reaffirm main carrier TR.
4, border base station enters single station or cluster mode
The BNCH for receiving border base station, when discovery border base station is (if peer-to-peer system only has a border base station and nothing
The case where other base stations, is then not necessarily to consider this exception) single station mode is become by cluster mode, entire GD is in standby mode, until
Border base station restores cluster mode again.
5, the vehicle-mounted RX terminal with vehicle-mounted TX terminal of TR loses synchronous
After UMAC layers of completion scanning are synchronous, need to monitor the synchronization between the vehicle-mounted RX terminal of TR and vehicle-mounted TX terminal,
According to vehicle-mounted TX terminal the 2nd LMAC layers { M2, F2, S2, fn2, sn2 } and vehicle-mounted RX terminal the first LMAC layers M1,
F1, S1, fn1, sn1 } do following difference operation:
{fn2,sn2}- {fn1,sn1}= {M2,F2,S2}- {M1,F1,S1}；
Subtraction in formula is meant that the timeslot offset for calculating the two then prompts vehicle-mounted TX terminal once equation is unsatisfactory for
When base between vehicle-mounted RX terminal exports and multiframe interrupt output has exception.It is under normal circumstances mostly hardware anomalies, this
Situation should seldom occur.
6, the vehicle-mounted RX terminal of TR loses synchronous with border base station
It has been had been described in TR scanning process, after scanning is completed, i.e., after synchronous regime becomes RX_SYNC,
Whether UMAC layers wanted moment monitoring TR synchronous with border base station, the BSCH for needing to continue to capture border base station BS_M, BS_F,
BS_S }, it is ensured that:
{BS_M,BS_F,BS_S}={M1,F1,S1}；That is BS_M=M1, and BS_F=F1, and BS_S=S1.
{ M1, F1, S1 } is the slot count when LMAC layer of vehicle-mounted RX terminal receives BSCH, that is, current UMAC
The frame count of layer, once deviation exists, so that it may it is considered that { BS_M, BS_F, the BS_S } of BSCH is adjusted, it should weigh immediately
It is newly synchronized to two LMAC layers of configurations, for the sake of simplicity, TR reenters scanning process, i.e. synchronous regime becomes WAIT_SYNC.
The above exception is once occur, and the UMAC layer of the TR needs to report MLE layers, and TR reenters scanning process, what when
It waits and restores normal, TR is reported to MLE layers scan successfully again.MLE layers receive these exceptions, as shown in Figure 6 and Figure 7, update net
The state and the number of channel of equipment are closed, detailed process is shown in the standby process of booting.
Claims (3)
1. realizing the gateway that interconnects of Digital Clustering, it is characterised in that including gateway controller GC and transceiver T R,
Gateway controller GC connects transceiver T R by Ethernet interface, and transceiver T R includes vehicle-mounted RX terminal and vehicle-mounted TX whole
End, a vehicle-mounted RX terminal and a vehicle-mounted TX terminal combinations are at a backward channel machine, wherein vehicle-mounted RX terminal is for receiving
Signal, vehicle-mounted TX terminal is for sending signal；The vehicle-mounted RX terminal includes the first LMAC layers of the i.e. first lower MAC layer and first
PHY layer, the vehicle-mounted TX terminal include LLC layer, UMAC layers of i.e. upper MAC, the 2nd LMAC layers i.e. second lower MAC layers and the 2nd PHY
Layer；The gateway controller GC includes interface layer, CC layers i.e. call control layer, SDS layers i.e. short data service layer, MM layers i.e. movement
Property management level and MLE layers i.e. mobile link physical layer；MM layers described, CC layers and SDS layers upwardly through interface layer and bridge joint
Center BCC communication, passes downwardly through MLE layers and communicates with TR；Described MLE layers supports MM layers, CC layers and SDS layers of business to need upwards
It asks, is communicated with transceiver T R downwards；The LLC layer is communicated with MLE layers upwards, is communicated with UMAC layers downwards；It is UMAC layers described
Communicated upwards with LLC layer and MLE layers, downwards with the first LMAC layers and the 2nd LMAC layers communicate；Described 2nd LMAC layers to
It is upper to be communicated with UMAC layers, it is communicated with the second PHY layer downwards；Described first LMAC layers communicated upwards with UMAC layers, downwards with first
PHY layer communication.
2. the gateway according to claim 1 realizing Digital Clustering and interconnecting, it is characterised in that the vehicle-mounted TX
Terminal is connect by Ethernet interface with gateway controller GC.
3. a kind of method realizing Digital Clustering using gateway described in claim 1 and interconnecting, it is characterised in that
Its operational process is as follows:
1) be switched on standby process:
A. after gateway booting, MLE layers immediately to respectively the normal TR configuration work frequency point of line, each TR start certainly therewith
Oneself scanning process, gateway are in standby；
B. gateway in the standby state, the MLE layers of scanning result for receiving each TR, if scanning result is normal and is main load
That wave TR is reported gateway enters state of activation as a result, main carrier TR is scanned successfully, and MLE layers to be reported to BCC currently available
The number of channel；If it is other scanning results, gateway controller GC only updates the currently available number of channel, is still within standby
State；
C. gateway is active, and gateway opens the interconnected passages with BCC, is started and peer-to-peer system boundary base
It eats dishes without rice or wine to access between standing；The MLE layers of operation irregularity for once receiving some TR then update channel if not main carrier TR
It counts and is reported to BCC；If it is main carrier TR, gateway enters standby mode, closes and the interconnected passages of BCC, stop with
It eats dishes without rice or wine to access between peer-to-peer system border base station；
2) TR scanning process:
First LMAC layers and the 2nd LMAC layer after receiving UMAC layers of scan request command, become reception state, beginning
Capture border base station BSCH, when the first LMAC layer with the 2nd LMAC layers be completed to border base station local radio frequency reference when
Clock calibration, that is, after completing AFC, UMAC layer to the first LMAC layers with the 2nd LMAC layers of configuration synchronization message and scrambling code information,
Then start the BNCH of parsing border base station；
3) exception management:
The exception management of gateway is mainly completed by MLE layers and UMAC layers, is responsible for for UMAC layers counting following several exceptions: TR
Vehicle-mounted RX terminal and vehicle-mounted TX terminal between network connection is abnormal, downlink reception is abnormal, main carrier switching, border base station enter
The vehicle-mounted RX terminal of single station or cluster mode, TR loses synchronous and TR vehicle-mounted RX terminal and border base station with vehicle-mounted TX terminal
Lose synchronization.
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| CN110336697B (en) * | 2019-06-28 | 2021-12-24 | 福建泉盛电子有限公司 | Method and system for writing frequency of DMR (digital Mobile radio) mobile station air interface |
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| CN110891248A (en) * | 2019-11-26 | 2020-03-17 | 河北远东通信系统工程有限公司 | Method for realizing interconnection and intercommunication between digital cluster systems |
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