CN1384676A - Demand assignment transmission method in mobile communication system - Google Patents
Demand assignment transmission method in mobile communication system Download PDFInfo
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- CN1384676A CN1384676A CN 01112843 CN01112843A CN1384676A CN 1384676 A CN1384676 A CN 1384676A CN 01112843 CN01112843 CN 01112843 CN 01112843 A CN01112843 A CN 01112843A CN 1384676 A CN1384676 A CN 1384676A
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Abstract
The demand assignment transmission method in mobile communication system is based on mobile communication system and satellite transmission system. The mobile communication system includes several subsystems, which complete data transmission via satellite transmission system. By attaching one signaling of primary group interface distribution according to requirement to the data between the subsystems, the satellite communication demand assignment function is realized in satellite transmission equipment with primary group interface. The said method saves the bandwidth of the network.
Description
The present invention relates to mobile communication and satellite communication technology, more specifically refer to realize demand assigned transmission method in mobile communcations system, while utilizing the method can realize the transport service between the subsystem interface of mobile communcations system, the distribution according to need of satellite transmission bandwidth (DAMA).
In the mobile communcations systems such as GSM, CDMA, WCDMA, CDMA2000, the transfer of data between subsystem interface need to be completed by transmission system.These interfaces include but are not limited to the A mouth between Abis mouth, base station controller (BSC) and the mobile switching centre (MSC) between base transceiver station in gsm system (BTS) and base station controller (BSC), the Iu mouth between the lub mouth between base station in WCDMA system (NodeB) and radio network controller (RNC), radio network controller (RNC) and core net (CN); A mouth between the Abis mouth between base transceiver station in CDMA2000 system (BTS) and base station controller (BSC), base station controller (BSC) and mobile switching centre (MSC).
Transfer of data between mobile communcations system subsystem interface need to guarantee certain transmission bandwidth and transmission quality, and the latter comprises the error rate, time delay, shake etc.
Conventional transmission means, comprises the optical fiber in wire transmission, the X digital subscriber line (XDSL) that short distance adopts, the cable closely adopting at present, the microwave in wireless transmission, satellite etc., and these these means have advantage and application space separately.
The extreme terrain areas such as, desert scarcely populated at some, island, utilizing satellite communication to solve transmission problem is a kind of quick, effective, economic means.Between base transceiver station (BTS) and base station controller (BSC), the networking diagram of Abis mouth application can be first shown in Figure 1 in gsm system for satellite transmission, and Abis mouth satellite transmission is in some regional practical application at present.
Sts satellite transmission system is comprised of satellite and terrestrial transmission equipment.Wherein terrestrial transmission equipment comprises the satellite-transmission gear that is comprised of modulator-demodulator and transceiver, antenna etc.
Although satellite communication has, area coverage is wide, the position of building a station is subject to the advantages such as influence of topography little, ground station mobility is strong, but satellite link lease expenses is higher simultaneously, the bi-directional data of ground 64k bandwidth, difference due to satellite-transmission gear, the bandwidth of broadcasting TV programs by satellite approximately needs 160-190kHz, year ten thousand dollars of about 0.7-0.9 of satellite link rent (1MHz satellite bandwidth annual rent is ten thousand dollars of 4-5).
Because data traffic between mobile communication subsystem interface is large, requirement of real-time is higher, if adopt merely satellite communication to solve the transmission between interface, the satellite link lease expenses problem of long-term great number is to hinder the Main Bottleneck that this mode is promoted.
The object of this invention is to provide a kind of demand assigned transmission method of realizing in mobile communcations system, utilize the method can realize in the application of mobile communcations system, save satellite transmission bandwidth and save long-term great number satellite link lease expenses.
To achieve these goals, method of the present invention adopts following technical scheme: should in mobile communcations system, realize demand assigned transmission method based on mobile communcations system and sts satellite transmission system, in mobile communcations system, comprise some subsystems, transfer of data between each subsystem can be completed by sts satellite transmission system, by additional in the data between each subsystem, meet primary group interface demand assigned signaling, by the satellite-transmission gear with primary group interface, realized the distribution according to need of satellite communication.
The method is further comprising the steps:
A, by the additional demand assigned signaling of data of a subsystem A output of mobile communcations system, inputs to the primary group interface of the satellite-transmission gear of this subsystem A mono-side;
B, the satellite phone of described sts satellite transmission system is launched and is broadcast TV programs by satellite after modulation the data after subsystem A conversion, utilizes the demand assignment function of satellite-transmission gear to realize the dynamic assignment of satellite bandwidth simultaneously;
C, satellite completes forwarding to the signal of broadcasting TV programs by satellite described in step b again;
D, in mobile communcations system, the satellite-transmission gear of another subsystem B side corresponding with subsystem A described in step a carries out receiving demodulation by the signal after the forwarding in step c and exports the subsystem B of mobile communcations system to, completes two transfer of data between subsystem A, B.
When above-mentioned mobile communcations system is Golbal System for Mobile Communic-ations, two mobile communication subsystems are respectively base station controller and base transceiver station, to the wireless signaling channel in data between base station controller and base transceiver station and Operation and maintenance link, adopt preassignment mode to transmit, voice channel adopts distribution according to need transmission.
The distribution according to need interface unit of side of base station controller, according to the distribution request of voice channel, is set up the signaling of the satellite link application that meets satellite-transmission gear signaling structure, and exchanges to the 16th time slot of base station controller and base transceiver station interface data.
The voice-channel assignment request that the distribution according to need interface unit of base transceiver station side sends according to the base station controller of receiving, foundation meets the signaling of the satellite link application of satellite-transmission gear signaling structure, and exchanges to the 16th time slot of base station controller and base transceiver station interface data.
When above-mentioned mobile communcations system is broadband CDMA system, two mobile communication subsystems are respectively base station controller and base transceiver station, to the signaling channel in data between base station controller and base transceiver station and Operation and maintenance link, adopt preassignment mode to transmit, voice channel adopts distribution according to need transmission.
The distribution according to need interface unit of side of base station controller, according to the distribution request of voice channel, is set up the signaling of the satellite link application that meets satellite-transmission gear signaling structure, and exchanges to the 16th time slot of base station controller and base transceiver station interface data.
The voice-channel assignment request that the distribution according to need interface unit of base transceiver station side sends according to the base station controller of receiving, foundation meets the signaling of the satellite link application of satellite-transmission gear signaling structure, and exchanges to the 16th time slot of base station controller and base transceiver station interface data.
Owing to having adopted the above-mentioned demand assigned transmission method of realizing in mobile communcations system, while completing between the subsystem in mobile communication transfer of data by sts satellite transmission system, in data between each subsystem, add and meet primary group interface demand assigned signaling, by the satellite-transmission gear with primary group interface, realized the distribution according to need of satellite communication.Therefore, transmission bandwidth between each subsystem is only just distributed when having call request, and the whole network bandwidth is dynamically adjusted according to demand between each subsystem, the calling flow of each subsystem synchronization is different, by after bandwidth unified distribution, scale and benefit will make the wide saving of whole guipure; Suitably increase the satellite repeater call loss of bringing due to distribution according to need, the bandwidth of further having saved whole net simultaneously.
Below in conjunction with drawings and Examples, method of the present invention is described in further detail:
Fig. 1 is the satellite transmission networking schematic diagram in Golbal System for Mobile Communic-ations adopting at present.
Fig. 2 is the inventive method schematic flow sheet.
Fig. 3 is satellite transmission one of networking schematic diagram in mobile communcations system after employing method of the present invention.
Fig. 4 is for adopting after method of the present invention satellite transmission call flow schematic diagram after networking in Golbal System for Mobile Communic-ations.
Fig. 5 for adopt satellite transmission after method of the present invention in mobile communcations system networking schematic diagram two.
It is based on mobile communcations system and sts satellite transmission system that the present invention realizes demand assigned transmission method in mobile communcations system, in mobile communcations system, comprise some subsystems, transfer of data between each subsystem is completed by sts satellite transmission system, in data between each subsystem, add and meet primary group interface demand assigned signaling, by the satellite-transmission gear with primary group (E1) interface, realized the distribution according to need of satellite communication.
In sts satellite transmission system, comprise satellite-transmission gear, antenna, satellite, satellite phone is contained among satellite-transmission gear again.
Refer to shown in Fig. 2, the method is further comprising the steps:
A, by the additional demand assigned signaling of data of mobile communcations system one subsystem A output, inputs to primary group (E1) interface of this (subsystem A mono-side) satellite-transmission gear;
B, the data of the satellite phone of described (subsystem A side) sts satellite transmission system after to the conversion of this subsystem are launched and are broadcast TV programs by satellite after modulation, utilize the demand assignment function of satellite-transmission gear to realize the dynamic assignment of satellite bandwidth simultaneously;
C, satellite completes forwarding to the signal of broadcasting TV programs by satellite described in step b again;
D, the satellite-transmission gear of another subsystem B side that the subsystem A with described in step a in mobile communcations system is corresponding, signal after forwarding in step c is carried out receiving demodulation and exports the subsystem B of mobile communcations system to, complete two transfer of data between subsystem A, B.
Please again in conjunction with shown in Fig. 3, when above-mentioned mobile communcations system is Golbal System for Mobile Communic-ations (GSM), two mobile communication subsystems are respectively base station controller (BSC) and base transceiver station (BTS), data between base station controller (BSC) and base transceiver station (BTS) are carried out to signal and signaling conversion, wireless signaling channel in data and Operation and maintenance link adopt preassignment mode to transmit, and voice channel adopts distribution according to need transmission.
From the call flow of GSM, base transceiver station (BTS) side can directly not initiated assignment voice channel (TCH), and the distribution request of voice channel (TCH) is initiated by base station controller (BSC).During mobile subscriber's caller, the call signaling that base transceiver station (BTS) side is initiated is delivered to base station controller (BSC) by wireless signaling channel (RSL), when having continued by base station controller (BSC) assignment voice channel (TCH); When mobile subscriber is called, call signaling is delivered to after base station controller (BSC), by base station controller (BSC) assignment TCH channel.Thereby, base station controller (BSC) need to complete according to the distribution according to need satellite link function of calling out with the interface unit of satellite-transmission gear, base transceiver station (BTS) only needs to distribute request according to voice channel (TCH) that receive, that base station controller (BSC) sends with the interface unit of satellite-transmission gear, application satellite link bandwidth.
Please again in conjunction with shown in Fig. 4, BSC side distribution according to need interface unit is according to the assignment situation of voice channel (TCH), to BTS, sending before TCH assignment, to satellite-transmission gear, send satellite channel request, in the 16th time slot of Abis mouth, send pulse code modulation (PCM) signalling time slot with distribution according to need (DAMA) information.Pcm signaling time slot adopts R2 signaling form more, and the satellite link distribution according to need signaling that BSC produces need to meet corresponding signaling format.
Generally between BTS, BSC, the 16th time slot of data (Abis) generally transmits voice channel (TCH).So BSC side interface unit need to exchange to the pcm signaling with DAMA information the 16th time slot of Abis, this can complete as SD529 by switching net.
Finally, the Abis signal of delivering to BSC side satellite-transmission gear is to meet primary group signal its form, that comprise distribution according to need information.Satellite-transmission gear, according to DAMA information, is realized request and the distribution of satellite link, and saves satellite transmission bandwidth from whole net angle.After satellite link distributes, BSC pre-specified position via satellite transmission equipment realize the transmission of voice channel (TCH).After calling completes, the corresponding chain of tearing open that completes voice channel (TCH) and satellite link.
BTS side distribution according to need interface unit is realized relatively simple, only needs to distribute request according to voice channel that receive, that BSC sends (TCH) application satellite link bandwidth.Signaling exchange, the application of satellite link, tears chain etc. open, identical with BSC side distribution according to need interface unit realization flow.
Please again in conjunction with shown in Fig. 5, when above-mentioned mobile communcations system is broadband CDMA system (WCDMA), two mobile communication subsystems are respectively base station controller (RNC) and base transceiver station (NodeB), data between base station controller (RNC) and base transceiver station (NodeB) are carried out to signal and signaling conversion, signaling channel in data and Operation and maintenance link adopt preassignment mode to transmit, and voice channel adopts distribution according to need transmission.
From method of the present invention, can find out, the present invention has following effect:
For mobile communcations system, no matter be gsm system, or WCDMA system, distribution according to need can be saved the bandwidth of satellite transmission.
First, the carrier frequency number of base station can not complete the Complete Convergence to number of users, generally all leaves more than needed.For the lower area of telephone traffic, the meaning of this point is very large.
Secondly, be the scale effect based on statistics.From statistics angle, owing to allowing certain call loss, determine the Irish number of base station carrier number, and can number of service subscribers, both ratios are non-linear relations.By expanding carrier frequency number, can obtain the more growth of vast scale of number of users, thereby obtain the scale effect based on statistics.By DAMA, can think integrated to a plurality of site users quantity, thereby reach, to save carrier frequency number be the object of transmission bandwidth.Website number is more, and effect is more obvious.
For scale effect, be analyzed as follows.
TCH timeslot number N, we consider 2,4,6,8,12 totally 5 kinds of situations.
Website is counted n, considers 5,10,20,50,100 totally 5 kinds of situations.
Call loss BT, comprises wireless call loss BT, generally gets 2%, 5%; The call loss BT ' that adopts DAMA, generally gets 1%, 2%.
1, computational process is as follows:
While not adopting DAMA, need total TCH to count the non-DAMA=n * N of N;
While adopting DAMA, the mono-station of single station telephone traffic A, can be found according to Ireland table by N, BT; Total traffic A is total=the mono-station of n * A; Need total TCH count NDAMA, can be total by A, BT ' finds according to Ireland table.
Adopt the income of DAMA
the non-DAMA/NDAMA of=N.
2, result is as follows: 1) B
t=2%, B
tduring '=1%,
be listed as follows
2) B
t=2%, B
tduring '=2%,
be listed as follows
3) B
t=5%, B
tduring '=1%,
be listed as follows
4) B
t=5%, B
tduring '=2%,
be listed as follows
| ?1×64k | ?2×64k | ?2×64k | ?3×64k | ?4×64k | |
| ?n＝5 | ?2 | ?1.67 | ?1.5 | ?1.43 | ?1.33 |
| ?n＝10 | ?2.86 | ?2.11 | ?1.82 | ?1.63 | ?1.48 |
| ?n＝20 | ?4 | ?2.5 | ?2.03 | ?1.82 | ?1.58 |
| ?n＝50 | ?5.26 | ?2.89 | ?2.27 | ?1.98 | |
| ?n＝100 | ?6.06 | ?3.13 |
| ?1×64k | ?2×64k | ?2×64k | ?3×64k | ?4×64k | |
| ?n＝5 | ?2.5 | ?1.82 | ?1.67 | ?1.54 | ?1.4 |
| ?n＝10 | ?3.33 | ?2.35 | ?1.94 | ?1.74 | ?1.58 |
| ?n＝20 | ?4.44 | ?2.67 | ?2.14 | ?1.88 | ?1.64 |
| ?n＝50 | ?5.56 | ?3.03 | ?2.34 | ?2.04 | |
| ?n＝100 | ?6.45 | ?3.28 |
| ?1×64k | ?2×64k | ?2×64k | ?3×64k | ?4×64k | |
| ?n＝5 | ?1.67 | ?1.43 | ?1.25 | ?1.21 | ?1.15 |
| ?n＝10 | ?2 | ?1.67 | ?1.46 | ?1.36 | ?1.25 |
| ?n＝20 | ?2.86 | ?1.9 | ?1.62 | ?1.48 | ?1.33 |
| ?n＝50 | ?3.45 | ?2.17 | ?1.79 | ||
| ?n＝100 | ?3.92 | ?2.33 |
| ?1×64k | ?2×64k | ?2×64k | ?3×64k | ?4×64k | |
| ?n＝5 | ?1.67 | ?1.67 | ?1.43 | ?1.43 | ?1.33 |
| ?n＝10 | ?2.22 | ?2 | ?1.71 | ?1.57 | ?1.41 |
| ?n＝20 | ?2.86 | ?2.22 | ?1.85 | ?1.67 | ?1.48 |
| ?n＝50 | ?3.7 | ?2.44 | ?1.97 | ||
| ?n＝100 | ?4.17 | ?2.56 |
Note: partial data is excessive, cannot look into Ireland table.
Visible, under multi-site, low TCH configuring condition, adopt DAMA meaning maximum.The call loss that with due regard to DAMA introduces, can obtain certain income; But by the call loss of increase system, income is not obvious, and unfavorable to system.
可看到，本发明具有下特点：
此方案对现有接口改动较小；
由于脉冲编码调制(PCM)标准是统一的，这种按需分配方式的接口对
于不同的卫星传输设备大同小异。此方案与产品的相关性较低；
由于卫星传输设备的最小分辨带宽是64k，而全球数字移动通讯系统
(GSM)语音编码带宽是16k，采用此方案(还有其它方案在一并提交的专利
申请中)可节省卫星带宽但还不能最大程度的节省卫星带宽。
Claims (8)
1, a kind of demand assigned transmission method of realizing in mobile communcations system, the method is based on mobile communcations system and sts satellite transmission system, in mobile communcations system, comprise some subsystems, transfer of data between each subsystem can be completed by sts satellite transmission system, it is characterized in that: by additional in the data between each subsystem, meet primary group interface demand assigned signaling, by the satellite-transmission gear with primary group interface, realized the distribution according to need of satellite communication.
2, the demand assigned transmission method of realizing in mobile communcations system as claimed in claim 1, is characterized in that, the method is further comprising the steps:
A, by the additional demand assigned signaling of data of mobile communcations system one subsystem A output, inputs to the primary group interface of the satellite-transmission gear of this subsystem A mono-side;
B, the satellite phone of described sts satellite transmission system is launched and is broadcast TV programs by satellite after modulation the data after this subsystem A conversion, utilizes the demand assignment function of satellite-transmission gear to realize the dynamic assignment of satellite bandwidth simultaneously;
C, satellite completes forwarding to the signal of broadcasting TV programs by satellite described in step b again;
D, the satellite-transmission gear of another subsystem B side that the subsystem A with described in step a in mobile communcations system is corresponding, signal after forwarding in step c is carried out receiving demodulation and exports the subsystem B of mobile communcations system to, complete two transfer of data between subsystem A, B.
3, the demand assigned transmission method of realizing in mobile communcations system as claimed in claim 2, it is characterized in that, when above-mentioned mobile communcations system is Golbal System for Mobile Communic-ations, two mobile communication subsystems are respectively base station controller and base transceiver station, to the wireless signaling channel in data between base station controller and base transceiver station and Operation and maintenance link, adopt preassignment mode to transmit, voice channel adopts distribution according to need transmission.
4, the demand assigned transmission method of realizing in mobile communcations system as claimed in claim 3, it is characterized in that, the distribution according to need interface unit of side of base station controller is according to the distribution request of voice channel, foundation meets the signaling of the satellite link application of satellite-transmission gear signaling structure, and exchanges to the 16th time slot of base station controller and base transceiver station interface data.
5, the demand assigned transmission method of realizing in mobile communcations system as claimed in claim 3, it is characterized in that, the voice-channel assignment request that the distribution according to need interface unit of base transceiver station side sends according to the base station controller of receiving, foundation meets the signaling of the satellite link application of satellite-transmission gear signaling structure, and exchanges to the 16th time slot of base station controller and base transceiver station interface data.
6, the demand assigned transmission method of realizing in mobile communcations system as claimed in claim 2, it is characterized in that, when above-mentioned mobile communcations system is broadband CDMA system, two mobile communication subsystems are respectively base station controller and base transceiver station, to the signaling channel in data between base station controller and base transceiver station and Operation and maintenance link, adopt preassignment mode to transmit, voice channel adopts distribution according to need transmission.
7, the demand assigned transmission method of realizing in mobile communcations system as claimed in claim 6, it is characterized in that, the distribution according to need interface unit of side of base station controller is according to the distribution request of voice channel, foundation meets the signaling of the satellite link application of satellite-transmission gear signaling structure, and exchanges to the 16th time slot of base station controller and base transceiver station interface data.
8, the demand assigned transmission method of realizing in mobile communcations system as claimed in claim 6, it is characterized in that, the voice-channel assignment request that the distribution according to need interface unit of base transceiver station side sends according to the base station controller of receiving, foundation meets the signaling of the satellite link application of satellite-transmission gear signaling structure, and exchanges to the 16th time slot of base station controller and base transceiver station interface data.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011128437A CN1148079C (en) | 2001-05-09 | 2001-05-09 | Demand assignment transmission method in mobile communication system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011128437A CN1148079C (en) | 2001-05-09 | 2001-05-09 | Demand assignment transmission method in mobile communication system |
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| Publication Number | Publication Date |
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| CN1384676A true CN1384676A (en) | 2002-12-11 |
| CN1148079C CN1148079C (en) | 2004-04-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108432156A (en) * | 2015-10-28 | 2018-08-21 | 沃尔德伍卫星有限公司 | The method of satellite system and increase satellite system capacity with increased message capacity |
-
2001
- 2001-05-09 CN CNB011128437A patent/CN1148079C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108432156A (en) * | 2015-10-28 | 2018-08-21 | 沃尔德伍卫星有限公司 | The method of satellite system and increase satellite system capacity with increased message capacity |
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| CN1148079C (en) | 2004-04-28 |
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