CN1863343A - Mobile communication base site sub-system and method of transmitting data thereof - Google Patents
Mobile communication base site sub-system and method of transmitting data thereof Download PDFInfo
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- CN1863343A CN1863343A CNA2005100293944A CN200510029394A CN1863343A CN 1863343 A CN1863343 A CN 1863343A CN A2005100293944 A CNA2005100293944 A CN A2005100293944A CN 200510029394 A CN200510029394 A CN 200510029394A CN 1863343 A CN1863343 A CN 1863343A
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Abstract
This invention discloses a sub-system of a mobile communication base station and a method for transmitting data to realize quick and flexible networking, in which, the communication links among functional entities of the base station system are realized by the radio links among transmission carrier frequencies which are realized by simple improvement on the basis of original service carrier communication links.
Description
Technical field
The present invention relates to mobile communication base site sub-system, particularly the mobile communication base site sub-system of realizing based on wireless transmission.
Background technology
Global system for mobile communications (Global System for Mobile Communications, be called for short " GSM ") be second generation cell mobile communication systems, also be global first carries out standardized digital cellular mobile communication systems to digital modulation mode, network configuration and class of business.The business that GSM provides is divided into voice service, bearer service, supplementary service and short message service.Gsm system adopts Subscriber Identity Module (Subscriber Identify Module is called for short " SIM ").SIM card is a memory, has wherein stored Personal Identity Number such as user identification code, authentication and enciphered message and one 4 figure place etc. and user-dependent information.The user can obtain the service of system on any GSM terminal by SIM card.
The standard of gsm system is to be formulated by ETSI European Telecommunications Standards Institute's (Europe TelecommunicationStandard Institute is called for short " ETSI "), and the GSM digital mobile communication system of any tame manufacturers produce all must meet the GSM technical specification.Gsm system has following main feature as a kind of Open architecture and the designed system that faces the future:
Gsm system is made up of several subsystems, and can with various public networks, as common service telecommunications network (Public Service Telecommunication Network, abbreviation " PSTN "), ISDN(Integrated Service Digital Network) (Integrated Service Data Network, abbreviation " ISDN "), public data network intercommunication, interconnection such as (Public Data Network are called for short " PDN ").Gsm system can provide transnational automatic roaming.Gsm system as voice service and urgent call etc., also can provide various bearer services, supplementary service and the business relevant with ISDN except that teleservice is provided.Gsm system has to be encrypted and authentication functions, can guarantee the secret and network security of user's communications.Gsm system has flexible network configuration, can satisfy the requirement of user to big capacity, high density business.The gsm system antijamming capability is stronger, good communication quality in the overlay area.The GSM subscriber terminal equipment adopts very lagre scale integrated circuit (VLSIC) and digital signal processor, and volume is littler, weight is lighter, with better function.
Gsm system is made of three main subsystems that are coupled to each other, and connects by certain network interface and user.Three subsystems are base station sub-system (Base Station Subsystem, be called for short " BSS "), network and switching subsystem (Network and Switching Subsystem, be called for short " NSS ") and operation support subsystem (Operation Supporting Subsystem is called for short " OSS ").Travelling carriage (MobileStation is called for short " MS ") also is a subsystem, but a part of regarding BSS usually as.
BSS is responsible for providing and manage transmission channel between NSS and MS in the gsm system, particularly comprises the wave point management between the functional entity of MS and gsm system.NSS is responsible for the management of communication service, guarantee MS and relevant public network or with other MS between set up and communicate by letter.That is to say the direct and MS intercommunication of NSS, the also direct and public correspondence net interconnecting of BSS.MS, BSS and NSS form the entity part of gsm system.OSS then provides these actual motions control, maintenance and management partly for operator.
Travelling carriage is the equipment of user's practicality in the GSM mobile radio communication, and the type of travelling carriage mainly contains Vehicle mounted station and hand-held station (mobile phone).Along with the digital mobile phone of GSM standard further to small-sized, light and handy and multifunctional direction development.MS enters the conventional wireless communication function and relevant treatment function of gsm system except that providing by wave point, also must provide and the user between interface.Such as the needed microphone of dial-up, loud speaker, display screen and keyboard are provided; Also need when carrying out data communication to provide and some other terminal equipment between interface, as and personal computer and facsimile machine between interface.The another one pith of MS is a SIM card, gsm system is discerned the user by SIM card, it is not to be bound by a user regularly that the application of SIM card makes travelling carriage, for Personal Communications Services (PersonalCommunication Service is called for short " PCS ") is had laid a good foundation.
BSS concerns the closest and the most direct element with wireless aspect in the gsm system.It sends and receives information by wireless mode, and carries out the management of Radio Resource.On the other hand, the mobile switching centre among BSS and the NSS (Mobile Switching Center is called for short " MSC ") links to each other, and realizes between the mobile subscriber or communicating to connect between mobile subscriber and the local user, transfer system information and user profile etc.For BSS is partly operated, maintenance and management, also to set up communicating to connect between BSS and the OSS.
BSS is made up of base transceiver station (Base Transceiver Station is called for short " BTS ") and base station controller (Base Station Controller is called for short " BSC ") two parts functional entity.The BSC that the BTS that links to each other with travelling carriage by wave point and opposite side link to each other with switch, BTS is responsible for wireless transmission, BSC is responsible for control and management.BSS is made up of a BSC and one or more BTS, and a BSC can control dozens of BTS according to the telephone traffic needs.BTS can directly link to each other with BSC, also can pass through Base Station Interface Equipment (Base Interface Equipment is called for short " BIE ") and adopt the connected mode of far-end control to link to each other with BSC, and it connects link generally is wired.BSS also should comprise transcoder (Transcoder is called for short " TC ") and corresponding submultiplex equipment (Sub-Multiplexer is called for short " SM ").Transcoder generally places between BSC and the MSC, and the flexibility of networking is higher and can reduce the quantity of transmission equipment like this.A kind of typical BSS with this locality and far-end configuration BTS forms mode as shown in Figure 1.
BTS is a base transceiver station, also is the important component part of BSS.It is controlled by BSC, finishes the conversion between BSC and the wireless channel, realizes the wireless transmission of air interface between BTS and the MS and relevant controlled function.BTS mainly partly is made up of Base Band Unit, carrier frequency unit, control unit and air feedback unit etc.Base Band Unit is mainly used in necessary speech and data rate is adaptive and chnnel coding etc.; The carrier frequency unit is mainly used in the transmission of modulating/demodulating and radiofrequency signal and reception etc.; Control unit then is used for the operation and maintenance of BTS.Air feedback unit is mainly used in the shunt of radiofrequency signal/close the road and radiofrequency signal is become electromagnetic wave or electromagnetic wave is converted to radiofrequency signal.When BSC and BTS were not located at same place, transmission unit was necessary, was connected with far-end between the BTS to realize BSC; If BSC and BTS place same place, transmission unit can save.
BSC is the control section of BSS, finishes the management to various interface, bears the management of Radio Resource and radio transmission parameter.In addition, carry out handover when (handoff claims handover again) when between two BTS of MS under same BSC controls, handoff procedure is handled by BSC rather than MSC, and this has just reduced processing burden of MSC widely.BSC mainly consists of the following components: the management of relevant interface, control and processing section; The common process part; Switching part.
NSS handles the exchange of external network and mobile subscriber's calling, and some relevant customer data bases are managed and operate.The function of NSS mainly comprises the function of exchange of gsm system and is used for user data and mobile management, the required database function of security management that it plays management role to the communication that reaches between mobile subscriber and other communication network user between the gsm system mobile subscriber.
MSC is whole GSM server, it controls the business of all BSC, provide function of exchange and with system in being connected of other function, and interface function with fixed networks such as PSTN, ISDN, PDN is provided, its mobile subscriber and mobile subscriber, mobile subscriber and fixed network user are connected to each other.MSC is from intrasystem three databases, be attaching position register (Home Location Register, abbreviation " HLR "), VLR Visitor Location Register (Visit Location Register, abbreviation " VLR ") and in AUC's (Authentication Center is called for short " AUC ") obtain customer location registration and the required total data of call request.In addition, MSC is also according to its up-to-date information request of obtaining partial data of new database more.As server, also supporting location registration of MSC, handover, automatic roaming etc. have function and other network function of moving characteristic.
VLR serves the mobile subscriber in its control area, is wherein storing the relevant information that enters registered roaming mobile subscribers in its control area, and the necessary condition of setting up call proceeding is provided for registered roaming mobile subscribers.VLR obtains and stores data necessary from this mobile subscriber's HLR.In case this mobile subscriber leaves its controlled area, then again in another VLR registration, this mobile subscriber's of former VLR deletion blotter data.So VLR can regard a dynamic subscriber's database as.
HLR is the central database of gsm system, is storing mobile subscriber's the related data of all registrations of this HLR control.A HLR can control several mobile switching areas down to whole mobile network, and all mobile subscribers' important static data all is stored among the HLR, comprising data such as identification number of mobile subscriber, access function, class of subscriber and supplementary service functions.Also storage and provide the actual relevant dynamic data of roaming place MSC for MSC among the HLR about the mobile subscriber.Like this, any incoming call all can be delivered to the called subscriber by corresponding route.
Gsm system has been taked special safety measure, as information encryption on subscription authentication, the wave point etc.AUC is storing authentication information and encryption key, is used for preventing having no right the mobile subscriber's that subscriber access system and guaranteeing communicates by wave point communication security.
In the existing as can be seen gsm system, each composition function entity B SC of BSS or the connection between the BTS all adopt wire link to realize.When in fact BSC controls a plurality of BTS, may be that BSC directly is connected by the link network of star with a plurality of BTS, also may be to adopt certain cascade mode to connect between the BTS, and then be connected with BSC.No matter adopt which kind of connected mode, realize being connected all by wire communication link lay between BSC and BTS, BTS and the BTS, such as E1 line etc. can transferring large number of data wire link.
Radio communication between BTS and a plurality of MS then is to adopt Radio Link to realize that this is the basic characteristics of radio communication on the other hand.In each sub-district, a plurality of MS are linked on the BTS by time division multiplexing (Time DivisionMultiplexing is called for short " TDM ") or frequency division multiplexing digital technologies such as (Frequency Division Multiplexing are called for short " FDM ").BTS use a business carrier frequency finish and a plurality of MS between radio communication.
In actual applications, there is following problem in such scheme: in some applied environment, such as the dangerously steep remote mountain areas of physical features, the space etc. of sealing all around, because the difficulty of laying-out, make the distributed architecture laying of whole base station system be difficult to realize, perhaps need to expend a large amount of human and material resources and just can set up, the coverage rate lifting for mobile communications network has serious obstruction like this.
Cause the main cause of this situation to be, connection link between each functional entity part of base station sub-system all is a wire link, needing physics to lay could realize, and for whole cell range is covered, must make each functional entity of base station sub-system partly be separated from each other and set up, so cause wire link to be laid and the difficulty of base station sub-system realization.
Summary of the invention
In view of this, main purpose of the present invention is to provide the method for a kind of mobile communication base site sub-system and transmission data thereof, makes setting up of mobile communication cells base station system not be subjected to physical link to lay the obstruction of difficulty, realizes quickly networking and flexible networking.
For achieving the above object, the invention provides a kind of mobile communication base site sub-system, comprise at least one base station controller and at least one base transceiver station,
Wherein, described base transceiver station receives the control of described base station controller, and provides air interface by business carrier frequency to travelling carriage, realizes and its radio communication; Described base station controller is controlled described base transceiver station, finish the management of network side interface communication, and managing radio resources and radio transmission parameter, at least one wireless transmission link also comprised, be used to connect two functional entitys of base station sub-system, the two ends of this wireless transmission link are the transmission carrier frequency.
Wherein, described wireless transmission link is used to connect described base station controller and described base transceiver station.
In this external described system, described wireless transmission link is used to connect different base transceiver stations.
In this external described system, described transmission carrier frequency is merged into a high-speed channel with all multiplex channels;
Described transmission carrier frequency adopts the control technology of fixed radio communication;
The frame structure setting of other wire link compatibility in described transmission carrier frequency employing and the described mobile communication base site sub-system.
In this external described system, described mobile communication base site sub-system is used and global system for mobile communications.
In this external described system, described transmission carrier frequency and described business carrier frequency all adopt the GMSK (Guassian Minimum Shift Keying) modulation system.
In this external described system, adopt power climbing control in the described business carrier frequency, and remove described power climbing control in the described transmission carrier frequency.
The present invention also provides a kind of method by transmission carrier frequency transmission data, is applied to the communication between the transmission carrier frequency at wireless transmission link two ends in the system mentioned above, comprises following steps:
At transmitting terminal, described transmission carrier frequency carries out convolution with data to be transmitted; Add training sequence, protection bit, bit number sign then; At last its coding back is transmitted on described wireless transmission link;
At receiving terminal, described transmission carrier frequency is adjusted synchronously according to described training sequence; Data are extracted in the decoding of deconvoluting then.
Wherein, the adjustment at the described transmission carrier frequency of receiving terminal further comprises following substep synchronously:
Periodically adjust the time deviation of receive window;
Calculate frequency difference between itself and the transmitting terminal by receiving described training sequence or described data to be transmitted, and thus its local frequency is adjusted.
By relatively finding, the main distinction of technical scheme of the present invention and prior art is, communication link at (between BSC and BTS or between BTS and BTS) between each functional entity of base station system realizes that with the Radio Link between the transmission carrier frequency Radio Link between this transmission carrier frequency is to realize by simple modifications on the basis of the original business carrier frequency communication link in base station.
Difference on this technical scheme, brought comparatively significantly beneficial effect, promptly realize that with transmission carrier frequency Radio Link the mode of communicating by letter between each functional entity of base station system has solved the wireless communication problems that can't lay transmission equipment or lay the high area of transmission equipment cost, have advantages such as cost is low, networking speed is fast by contrast, help improving coverage rate and traffic carrying capacity;
Improve the GSM frequency range of the transmission carrier frequency employing that realizes based on existing business carrier frequency Radio Link and carry out wireless transmission, can save frequency resource and technological development cost.
Description of drawings
Fig. 1 is the composition frame chart of gsm system base station sub-system;
Fig. 2 is according to an embodiment of the invention based on the base station sub-system schematic diagram of wireless transmission.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
Basic ideas of the present invention are to use based on existing business carrier frequency radio communication to be improved to the transmission carrier frequency, set up Radio Link and replace present wire link, avoid the problems such as laying of circuit, and realize establishment of GSM base station system and networking easily.This base station sub-system comprises two transmission carrier frequency and relevant device thereof, and the transmission carrier frequency belongs to two composition function entities of BSS respectively as the two ends of Radio Link, and this link is realized the radio communication between two functional entitys." carrier frequency " herein is meant realizes functional module or the equipment that transfer of data is correlated with on certain frequency, if be exclusively used in service data transmission then be called " business carrier frequency ", if be used for transmission general data between two functional entitys then be called " transmission carrier frequency ".Functional entity herein is meant and is used to realize specific function and separate equipment physically, as base station, base station controller etc.
As seen the key point of this system is to connect the difference in functionality entity and the whole base station sub-system of framework with at least one Radio Link.This Radio Link can be by improving exploitation on the basis of existing gsm service carrier frequency radio communication.BSS is made of BSC and a plurality of BTS as previously mentioned, and the annexation between them can be a cascade, therefore the Radio Link of the present invention's proposition can be according to concrete needs, and which link has physics laying difficulty during such as the establishment base station, and whether decision adopts the Radio Link replacement.Therefore this Radio Link can be BSC with BTS between or being connected between BTS and the BTS.This BSS system just has two class carrier frequency like this, and a class is exactly that original business carrier frequency is used to realize the MS radio communication, and another kind of is exactly to transmit carrier frequency.
From top statement, can summarize a bare bones of the present invention: be exactly to replace laying the communication that difficult wire link is realized base station sub-system difference in functionality inter-entity with wireless transmission link.Fig. 2 shows according to an embodiment of the invention the base station sub-system block diagram based on wireless transmission.
BSS system among the figure comprises at least one BSC and at least one BTS.A plurality of as previously mentioned BTS can be connected on the BSC by the Star Network structure, shown in left side among the figure; Also can be that mode by cascade connects, shown in right side among the figure.At user side, to be responsible for providing air interface to realize and its radio communication by BTS in each sub-district to MS, this business carrier frequency that is BTS possesses realizes that BTS receives BSC control at opposite side simultaneously.At network side, BSC is responsible for controlling a plurality of BTS, finishes the telecommunication management of a plurality of interfaces, and managing radio resources and radio transmission parameter configuration, and BSC continues upwards to communicate by letter with whole mobile network's the MSC of switching center simultaneously.
In the first embodiment of the present invention, also comprise at least one wireless transmission link based on the BSS of wireless transmission, be used to connect two physical distribution at a distance of or the more serious functional entity of being separated by, with the BSS internal system communication that realizes being difficult to finish by physical circuit.The two ends of this wireless transmission link are the transmission carrier frequency, as shown in Figure 2.The realization of wireless transmission link can be with reference to the eat dishes without rice or wine realization of link of the business carrier frequency between MS in the existing system and the BTS, and those of ordinary skill in the art are not difficult to realize from existing MS based on business carrier frequency to the Radio Link of BTS the wireless transmission link based on similar transmission carrier frequency.
Certainly, because concrete applicable cases has various possibilities, such as might being that link between BSC and the BTS be difficult to be laid, also may is between the BTS and BTS under the cascade mode, therefore in the second embodiment of the present invention, be used to connect BSC and BTS based on wireless transmission link among the BSS of wireless transmission, shown in left side among Fig. 2, this applicable cases also may appear at the situation of BTS cascade, therefore has at least a BTS directly to link to each other with BSC this moment.And in the third embodiment of the present invention, be used to connect different BTS based on wireless transmission link among the wireless transmission BSS, as shown in Figure 3, this situation only appears at the situation of BTS cascade.
As seen, the present invention has realized setting up of the very difficult BSS system that realizes originally by wireless transmission link, all brings beneficial effect aspect a lot.Such as having similar using value for existing Nogata station technology, with respect to the Nogata station more advantages are arranged: good communication quality, network globality are strong.In addition, realize that wireless transmission also has following advantage: do not need other transmission equipment, have the fast advantage of networking; Particularly has very high value for the place that can't set up transmission equipment; For overseas operator, the frequency in the time of can saving microwave transmission is occupied expense; Improve coverage rate, realized quickly networking and flexible networking.Use the present invention and can solve in the wireless communication problems that can't lay the high area of transmission equipment or laying transmission equipment cost, and cost is low, networking speed is fast.
Consider problems such as the conventional network equipment upgrading is convenient, need provide convenient technical scheme feasible and with low cost, could guarantee that like this wireless transmission scheme can continue to have above-mentioned advantage the upgrading of the wireless transmission link that increases newly.In view of the above, in the fourth embodiment of the present invention second, on the basis of three embodiment, provided the upgrading scheme of setting up wireless transmission link, based on existing business carrier frequency, suitably improve and obtain transmitting carrier frequency, can be improved to such as function and to be applicable to single Large Volume Data channel transfer more the multiple access multiplexing of business carrier frequency, and can be reduced to fixedly (the concrete visible hereinafter realization ins and outs of the transmission carrier frequency of present embodiment) such as the controls of radio communication desired power of opposite end for moving the control of access constant power, thereby set up wireless transmission link, the realization principle of promptly transmitting carrier frequency is identical with business carrier frequency.
Transmission carrier frequency after the improvement has following difference with respect to original business carrier frequency:
At first, the more concentrated capacity of data volume transmission channel is bigger, this is because transmission channel is mainly used in a large amount of transmission of immediate data, does not therefore need to carry out similar and the multiplexing mechanism of business carrier frequency for a plurality of MS, directly a plurality of passages is merged into a high-speed channel;
Secondly, simplify for the technology such as power control that mobile communication is relevant, this is because the pairing wireless transmission link of transmission carrier frequency no longer has been the business carrier frequency corresponding mobile terminal, but two fixing opposite ends, so the relevant power control techniques of wireless employing mobile communication, and only need the relevant control technology of fixed radio communication;
In addition and since the transmission carrier frequency will with existing other wire link such as E1 line compatibility, therefore need to adopt the setting of the frame length and the frame structure that are similar to the E1 line, this point is also different with the existing business carrier frequency.
Be the realization ins and outs that example describes the transmission carrier frequency in detail below with the gsm system.
At first identical with business carrier frequency, the transmission carrier frequency still uses GMSK (Guassian Minimum Shift Keying) (GaussianMean Shift Keying is called for short " GMSK ") modulation system.GMSK modulation mode. power spectrum characteristic is preferably arranged, error performance than sorrow, particularly out-of-band radiation is little, be applicable to very much and be operated in very high band (Very High Frequency, be called for short " VHF ") and the mobile communication system of VHF band (Ultra High Frequency, abbreviation " UHF ").The GMSK of gaussian filtering before the modulation, its basic operation principle is that baseband signal is shaped through Gaussian filter earlier, carries out minimum shift keying (MSK) modulation again.Because the Gaussian pulse envelope after being shaped does not have precipitous edge, also do not have flex point, so spectral characteristic is better than the spectral characteristic of msk signal.
Secondly adopt power climbing control in the business carrier frequency, and remove described power climbing control in the transmission carrier frequency, this is because the functional entity at transmission carrier frequency two ends is fixed, and does not need some complicated control technologys of mobile communication aspect.Can reduce system complexity like this, reduce the system upgrade cost.
The prerequisite of such scheme is that BSC and BTS support the 16K transmission, and RSL and OML respectively account for the bandwidth of 1 16Kbps, and 6 TCH take 6 * 16Kbps, and the BCCH of carrier frequency and SDCCH be the outer Abis transfer resource of occupy volume not; The GPRS CS3/CS4 business of supporting business carrier frequency not.
In concrete application, such as because the GMSK modulation rate is 270.833Kbps, be 128Kbps satisfying the effective data rate that the BSS internal request transmits under the above-mentioned precondition, therefore can continue to use 2 times of convolution modes.In addition, will adopt the longer time to comprise a training sequence, take the wireless transmission resources of 270.833-128*2=14.833Kbps such as the location of data and synchronisation measures and training sequence jointly.And for the sending and receiving end stationary problem, then receive and dispatch with the 6ms time period, be equivalent to 48 E1 frames, each E1 frame 125us, can comprise the preceding data of convolution is 768.
The fifth embodiment of the present invention is on the basis of the 4th embodiment, and the communication process between the described transmission carrier frequency at wireless transmission link two ends comprises following steps: at transmitting terminal, the transmission carrier frequency carries out convolution with data to be transmitted; Add training sequence, protection bit, bit number sign then; At last its coding back is transmitted on wireless transmission link.At receiving terminal, the transmission carrier frequency is adjusted synchronously according to training sequence; Data are extracted in the decoding of deconvoluting then.
Wherein, realize adjusting synchronously by the time deviation of periodically adjusting receive window at the described transmission carrier frequency of receiving terminal.In addition, calculate frequency difference between itself and the transmitting terminal at the described transmission carrier frequency of receiving terminal by receiving described training sequence, and thus its local frequency is adjusted, realize adjusting synchronously.
With above-mentioned applicable cases is example, further specifies the concrete action of transmission carrier frequency in communication process.On existing carrier frequency base station basis, just can finish above function to the improvement a little of two transmission carrier frequency and business carrier frequency.
When transmitting terminal transmission carrier frequency was handled descending transmission data, 1520,1536 or 1552 bits that 760,768 or 776 data to be transmitted of 47.5～48.5 E1 frames carried out after processings such as convolution added that 2 training sequences (52 bit) and 15 protection bits and 6 codings that identify transmission data significant bit numbers send together.Corresponding, receiving terminal transmission carrier frequency then needs to adjust synchronously, deconvolutes and decodes, and finally extracts data.
Here Guan Jian problem is to adjust synchronously.Because the uncertainty of distance between the transmitting-receiving transmission carrier frequency, 6ms regularly border is being to need to adjust at first, adjustment can by calculate according to the training sequence position deviation adjust.Inconsistency owing to wireless mouthful of frequency between the carrier frequency can cause the reception 6ms window data of receiving terminal carrier frequency to be offset simultaneously.Therefore the receiving terminal carrier frequency carries out periodic receive window adjustment to deal with this situation in the sixth embodiment of the present invention.
In addition, the data that the receiving terminal carrier frequency issues the transmitting terminal carrier frequency obtain the data before the convolution after by processing such as demodulation, streaming rate after the conversion is accurate E1 speed, and need emphasis to consider in the receiving terminal carrier frequency receiving course is the frequency adaptation problem: the receiving terminal carrier frequency will be adjusted the receiving demodulation clock, if send-receive clock speed words devious are with the dislocation gradually that causes training sequence after initial phase is synchronous; If be exactly the data transfer rate or the inconsistent words of E1 data transfer rate of transmitting-receiving carrier frequency in addition, will cause the generation of slip.For both of these case, eighth embodiment of the invention realizes Frequency Synchronization by the frequency difference adjustment, promptly by the receiving terminal carrier frequency by receiving in the data training sequence in the unit interval in the figure place of receive window deviation, the deviation of technology send-receive clock, perhaps whether meet by the bit number of the data that receive in the unit interval in receive window, calculate the frequency deviation of clock between the transmitting-receiving, thereby clock is adjusted.
Those of ordinary skill in the art are appreciated that, above-mentioned about all being that example describes in the description of embodiments of the invention with the gsm system, for other mobile communication system, if need equally to set up by BSC and BTS or similar a plurality of functional entitys are formed with it base station sub-system, then also can realize the goal of the invention of feasible fast and flexible networking, and not influence the spirit and scope of the invention by mode of the present invention.
Though by with reference to some preferred embodiment of the present invention, the present invention is illustrated and describes, those of ordinary skill in the art should be understood that and can do various changes to it in the form and details, and without departing from the spirit and scope of the present invention.
Claims (9)
1. a mobile communication base site sub-system comprises at least one base station controller and at least one base transceiver station,
Wherein, described base transceiver station receives the control of described base station controller, and provides air interface by business carrier frequency to travelling carriage, realizes and its radio communication; Described base station controller is controlled described base transceiver station, finishes the management of network side interface communication, and managing radio resources and radio transmission parameter,
It is characterized in that, also comprise at least one wireless transmission link, be used to connect two functional entitys of base station sub-system, the two ends of this wireless transmission link are the transmission carrier frequency.
2. mobile communication base site sub-system according to claim 1 is characterized in that, described wireless transmission link is used to connect described base station controller and described base transceiver station.
3. mobile communication base site sub-system according to claim 1 is characterized in that, described wireless transmission link is used to connect different base transceiver stations.
4. according to each described mobile communication base site sub-system in the claim 1 to 3, it is characterized in that described transmission carrier frequency is merged into a high-speed channel with all multiplex channels;
Described transmission carrier frequency adopts the control technology of fixed radio communication;
The frame structure setting of other wire link compatibility in described transmission carrier frequency employing and the described mobile communication base site sub-system.
5. according to each described mobile communication base site sub-system in the claim 1 to 3, it is characterized in that described mobile communication base site sub-system is used and global system for mobile communications.
6. mobile communication base site sub-system according to claim 5 is characterized in that, described transmission carrier frequency and described business carrier frequency all adopt the GMSK (Guassian Minimum Shift Keying) modulation system.
7. mobile communication base site sub-system according to claim 5 is characterized in that, adopts power climbing control in the described business carrier frequency, and removes described power climbing control in the described transmission carrier frequency.
8. method by transmission carrier frequency transmission data is applied to the communication between the transmission carrier frequency at wireless transmission link two ends in the described system of claim 1, it is characterized in that, comprises following steps:
At transmitting terminal, described transmission carrier frequency carries out convolution with data to be transmitted; Add training sequence, protection bit, bit number sign then; At last its coding back is transmitted on described wireless transmission link;
At receiving terminal, described transmission carrier frequency is adjusted synchronously according to described training sequence; Data are extracted in the decoding of deconvoluting then.
9. the method by transmission carrier frequency transmission data according to claim 8 is characterized in that, further comprises following substep synchronously in the adjustment of the described transmission carrier frequency of receiving terminal:
Periodically adjust the time deviation of receive window;
Calculate frequency difference between itself and the transmitting terminal by receiving described training sequence or described data to be transmitted, and thus its local frequency is adjusted.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106324561A (en) * | 2016-08-09 | 2017-01-11 | 上海优璞信息科技有限公司 | Distributed asynchronous positioning system and method based on ultra-wide band |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI964047A (en) * | 1996-10-09 | 1998-04-10 | Nokia Telecommunications Oy | Communication method and base station system |
| ITMI20021724A1 (en) * | 2002-08-01 | 2004-02-02 | Siemens Mobile Comm Spa | CONTROLLER FOR GSM AND 3G BASE RADIO STATIONS IN ONE CORE |
| EP2334137A3 (en) * | 2002-10-18 | 2012-07-25 | Kineto Wireless, Inc. | Method and apparatuses for releasing an ongoing communication session of a telecommunication device |
| CN1231080C (en) * | 2002-11-14 | 2005-12-07 | 华为技术有限公司 | A method for data transmission between base station transmitting-receiving platform and base station controller |
| CN2631165Y (en) * | 2003-06-18 | 2004-08-04 | 大唐移动通信设备有限公司 | Base station apparatus for micro community or very-micro-community use |
-
2005
- 2005-09-02 CN CNB2005100293944A patent/CN100417252C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106324561A (en) * | 2016-08-09 | 2017-01-11 | 上海优璞信息科技有限公司 | Distributed asynchronous positioning system and method based on ultra-wide band |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100417252C (en) | 2008-09-03 |
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