CN103391587A - High-speed train wireless data transmission method - Google Patents
High-speed train wireless data transmission method Download PDFInfo
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- CN103391587A CN103391587A CN2013103427983A CN201310342798A CN103391587A CN 103391587 A CN103391587 A CN 103391587A CN 2013103427983 A CN2013103427983 A CN 2013103427983A CN 201310342798 A CN201310342798 A CN 201310342798A CN 103391587 A CN103391587 A CN 103391587A
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- mobile
- relay station
- link
- base station
- user side
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Abstract
The invention discloses a high-speed train wireless data transmission method which comprises steps as follows: a movable relay station, a base station and a user side constitute a high-speed train wireless data communication system, wherein the movable relay station and the user side constitute an uplink which comprises a base station-movable relay station link and a movable relay station-user side link; and a downlink comprises a user side-movable relay station link and a movable relay station-base station link. According to the method, the influences of a data transmission speed and a data transmission quantity of the uplink and the downlink on the data transmission time are integrally considered, and influence factors are determined, so that the data transmission time is confirmed. Visibly, the whole performance of high-speed train wireless data transmission is better considered in the method, and the anti-jamming capability and the data transmission stability are improved.
Description
Technical field
The invention belongs to areas of information technology, be specifically related to a kind of bullet train radio data transmission method.
Background technology
Along with the continuous expansion of China Express Railway scale, the problem of radio communication highlights day by day in operating bullet train and between base station, railway both sides.Under high-speed railway running environment, because the speed of bullet train is very fast, even may reach 400km/h, because producing Doppler effect, high-speed motion make wireless signal centre frequency generation skew cause wireless channel environment to worsen, wireless transmission channel between train and base station presents time-varying characteristics, and high-speed motion is stricter to the time requirement of mobile subscriber's access, switching etc., occur that easily mobile network's overlapping area is not enough, the series of problems such as handover success rate descends, access difficulty.
On the other hand, the iron railway car is totally-enclosed metal car body, glass has also adopted metal coating glass, thereby cause the car body penetration loss to increase substantially, wireless signal is difficult to pass through car body, the car body penetration loss of the bullet train that railway adopts is than the large 10dB of the vertical penetration loss of conventional train car body left and right, and the high loss of high-speed train body has a significant impact network coverage quality, causes the interior radio signal quality of railway car poor.Also have, when the cavern of adverse circumstances, the waste of wireless signal can be larger.As seen, no matter be to consider or from the angle of train safe Real Time Monitoring, consider from the passenger gets online without being tethered to a cable the journey process demand, all to realize the Wireless Data Transmission of two-forty between bullet train and base station, railway both sides.
CN101980458A discloses a kind of high-speed train wireless communication device, and relay station is placed on bullet train, and base station lays along railway on ground; In down link, the base station transmitted signal is first passed through mobile-relay station, and then arrives each user terminal; In up link, user's transmitted signal first arrives mobile-relay station, and then through relay station, is forwarded to base station.This device has the feature of asymmetry for the transmission channel of the link of base station-relay station and relay station-user side, proposition take channel circumstance preferably relay station-user side link as benchmark, adjust transmission time or the transmission mode of base station-relay station link, make two class link transmission performance be complementary.Yet, single to the influencing factor consideration of Data Transmission Feature in this system, poor to the adaptive performance that the system actual transmissions time changes, especially do not consider the impact of data volume on transmission feature.
Therefore, the present invention is directed to that traditional bullet train moves and base station, railway both sides between the defect of wireless communication system, propose a kind of wireless communications method of movement-based relay station,, to improve mobile subscriber's communication quality, meet the demand of the data transmission service on bullet train.
Summary of the invention
The object of the invention is to avoid above-mentioned weak point of the prior art, a kind of high-quality high-speed railway communication system and method are provided.The present invention adopts following technical scheme:
A kind of bullet train radio data transmission method, it comprises: by mobile-relay station, base station and user side, form the bullet train wireless system for transmitting data; Wherein, forming up link by base station, mobile-relay station and user side comprises: base station-mobile-relay station link and mobile-relay station-user side link forms down link by base station, mobile-relay station and user side and comprises: user side-mobile-relay station link and mobile-relay station-base station link; Described mobile-relay station is arranged on described bullet train, and it comprises base station processor, obtains the data throughout S of base station-mobile-relay station link in described base station processor
1And the data throughout S of mobile-relay station-user side link
2Described base station processor calculates the data transmission period T of base station-mobile-relay station link according to following relational expression (1) and (2)
1Data transmission period T2 with mobile-relay station-user side link;
T
1＝γTT
2＝(1-γ)T (2)
Wherein: γ---the ratio of base station-mobile-relay station link data transmission performance and mobile-relay station-user side link data transmission performance;
V
1---the message transmission rate of base station-mobile-relay station link;
S
1---the data throughout of base station-mobile-relay station link;
V
2---the message transmission rate of mobile-relay station-user side link;
S
2---the data throughout of mobile-relay station-user side link;
T---the transmission required time of one frame data, given by base station processor;
In base station-mobile-relay station link, at T
1In time, base station is to the mobile-relay station wirelessly transmitting data;
In mobile-relay station-user side link, at T
2In time, mobile-relay station is to the user side wirelessly transmitting data;
Also obtain the data throughout S of user side-mobile-relay station link in described base station processor
1' and the data throughout S of mobile-relay station-base station link
2'; Described base station processor calculates the data transmission period T of user side-mobile-relay station link according to following relational expression (3) and (4)
1' and the data transmission period T of mobile-relay station-base station link
2';
T
1′＝γ′T′T
2′＝(1-γ′)T′ (2)
Wherein: γ '---the ratio of user side-mobile-relay station link data transmission performance and mobile-relay station-base station link data transmission performance;
V
1'---the message transmission rate of user side-mobile-relay station link;
S
1'---the data throughout of user side-mobile-relay station link;
V
2'---the message transmission rate of mobile-relay station-base station link;
S
2'---the data throughout of mobile-relay station-base station link;
T '---the transmission required time of one frame data, given by base station processor;
In user side-mobile-relay station link, at T
1In ' the time, user side is to the mobile-relay station wirelessly transmitting data;
In mobile-relay station-base station link, at T
2In ' the time, mobile-relay station is to the base station radio the transmission of data.
The present invention, due to the overall transfer performance of having considered up link and down link, has improved performance and the antijamming capability of bullet train Wireless Data Transmission.
Description of drawings
Fig. 1 is bullet train wireless system for transmitting data figure of the present invention.
Embodiment
The present invention is further described below in conjunction with drawings and Examples.
Embodiment: bullet train wireless system for transmitting data figure as shown in Figure 1.Based on this system, a kind of bullet train radio data transmission method comprises: by mobile-relay station, base station and user side, form the bullet train wireless system for transmitting data; Wherein, forming up link by base station, mobile-relay station and user side comprises: base station-mobile-relay station link and mobile-relay station-user side link forms down link by base station, mobile-relay station and user side and comprises: user side-mobile-relay station link and mobile-relay station-base station link; Described mobile-relay station is arranged on described bullet train, and it comprises base station processor, obtains the data throughout S of base station-mobile-relay station link in described base station processor
1And the data throughout S of mobile-relay station-user side link
2Described base station processor calculates the data transmission period T of base station-mobile-relay station link according to following relational expression (1) and (2)
1Data transmission period T with mobile-relay station-user side link
2
T
1＝γTT
2＝(1-γ)T (2)
Wherein: γ---the ratio of base station-mobile-relay station link data transmission performance and mobile-relay station-user side link data transmission performance;
V
1---the message transmission rate of base station-mobile-relay station link;
S
1---the data throughout of base station-mobile-relay station link;
V
2---the message transmission rate of mobile-relay station-user side link;
S
2---the data throughout of mobile-relay station-user side link;
T---the transmission required time of one frame data, given by base station processor;
In base station-mobile-relay station link, at T
1In time, base station is to the mobile-relay station wirelessly transmitting data;
In mobile-relay station-user side link, at T
2In time, mobile-relay station is to the user side wirelessly transmitting data;
Also obtain the data throughout S of user side-mobile-relay station link in described base station processor
1' and the data throughout S of mobile-relay station-base station link
2'; Described base station processor calculates the data transmission period T of user side-mobile-relay station link according to following relational expression (3) and (4)
1' and the data transmission period T of mobile-relay station-base station link
2';
T
1′＝γ′T′T
2′＝(1-γ′)T′ (4)
Wherein: γ '---the ratio of user side-mobile-relay station link data transmission performance and mobile-relay station-base station link data transmission performance;
V
1'---the message transmission rate of user side-mobile-relay station link;
S
1'---the data throughout of user side-mobile-relay station link;
V
2'---the message transmission rate of mobile-relay station-base station link;
S
2'---the data throughout of mobile-relay station-base station link;
T '---the transmission required time of one frame data, given by base station processor;
In user side-mobile-relay station link, at T
1In ' the time, user side is to the mobile-relay station wirelessly transmitting data;
In mobile-relay station-base station link, at T
2In ' the time, mobile-relay station is to the base station radio the transmission of data.
Wherein, described base station processor is according to required time T and the T ' of Speed Setting transmission one frame data of bullet train.
Further, described data comprise the detection signal of mobile phone signal, vision signal, audio signal, internet signal and transducer.
Claims (3)
1. bullet train radio data transmission method, the method comprises: by mobile-relay station, base station and user side, form the bullet train wireless system for transmitting data; Wherein, forming up link by base station, mobile-relay station and user side comprises: base station-mobile-relay station link and mobile-relay station-user side link forms down link by base station, mobile-relay station and user side and comprises: user side-mobile-relay station link and mobile-relay station-base station link; Described mobile-relay station is arranged on described bullet train, and it comprises base station processor, obtains the data throughout S of base station-mobile-relay station link in described base station processor
1And the data throughout S of mobile-relay station-user side link
2Described base station processor calculates the data transmission period T of base station-mobile-relay station link according to following relational expression (1) and (2)
1Data transmission period T with mobile-relay station-user side link
2
T
1＝γTT
2＝(1-γ)T (2)
Wherein: γ---the ratio of base station-mobile-relay station link data transmission performance and mobile-relay station-user side link data transmission performance;
V
1---the message transmission rate of base station-mobile-relay station link;
S
1---the data throughout of base station-mobile-relay station link;
V
2---the message transmission rate of mobile-relay station-user side link;
S
2---the data throughout of mobile-relay station-user side link;
T---the transmission required time of one frame data, by base station processor, set;
In base station-mobile-relay station link, at T
1In time, base station is to the mobile-relay station wirelessly transmitting data;
In mobile-relay station-user side link, at T
2In time, mobile-relay station is to the user side wirelessly transmitting data;
Also obtain the data throughout S of user side-mobile-relay station link in described base station processor
1' and the data throughout S of mobile-relay station-base station link
2'; Described base station processor calculates the data transmission period T of user side-mobile-relay station link according to following relational expression (3) and (4)
1' and the data transmission period T of mobile-relay station-base station link
2';
T
1′＝γ′T′T
2′＝(1-γ′)T′ (4)
Wherein: γ '---the ratio of user side-mobile-relay station link data transmission performance and mobile-relay station-base station link data transmission performance;
V
1'---the message transmission rate of user side-mobile-relay station link;
S
1'---the data throughout of user side-mobile-relay station link;
V
2'---the message transmission rate of mobile-relay station-base station link;
S
2'---the data throughout of mobile-relay station-base station link;
T '---the transmission required time of one frame data, by base station processor, set;
In user side-mobile-relay station link, at T
1In ' the time, user side is to the mobile-relay station wirelessly transmitting data;
In mobile-relay station-base station link, at T
2In ' the time, mobile-relay station is to the base station radio the transmission of data.
2. bullet train radio data transmission method according to claim 1 is characterized in that: described base station processor is according to required time T and the T ' of Speed Setting transmission one frame data of described bullet train.
3. bullet train radio data transmission method according to claim 1, it is characterized in that: described the transmission of data comprises the detection signal of mobile phone signal, vision signal, audio signal, internet signal and transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103427983A CN103391587A (en) | 2013-08-08 | 2013-08-08 | High-speed train wireless data transmission method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103427983A CN103391587A (en) | 2013-08-08 | 2013-08-08 | High-speed train wireless data transmission method |
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| Publication Number | Publication Date |
|---|---|
| CN103391587A true CN103391587A (en) | 2013-11-13 |
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ID=49535724
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013103427983A Pending CN103391587A (en) | 2013-08-08 | 2013-08-08 | High-speed train wireless data transmission method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106717110A (en) * | 2014-09-03 | 2017-05-24 | 株式会社Ntt都科摩 | Wireless relay station |
| CN106817737A (en) * | 2016-12-22 | 2017-06-09 | 电信科学技术研究院 | The method and device that a kind of utilization mobile relay is switched over |
| CN110620607A (en) * | 2019-09-12 | 2019-12-27 | 无锡德思普科技有限公司 | System for enhancing data transmission by using mobile relay station |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008084394A2 (en) * | 2007-01-12 | 2008-07-17 | Nortel Networks Limited | Moving relay technology option |
| CN101980458A (en) * | 2010-09-10 | 2011-02-23 | 北京工业大学 | High-speed train wireless communication device and method |
-
2013
- 2013-08-08 CN CN2013103427983A patent/CN103391587A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008084394A2 (en) * | 2007-01-12 | 2008-07-17 | Nortel Networks Limited | Moving relay technology option |
| WO2008084394A3 (en) * | 2007-01-12 | 2011-04-21 | Nortel Networks Limited | Moving relay technology option |
| CN101980458A (en) * | 2010-09-10 | 2011-02-23 | 北京工业大学 | High-speed train wireless communication device and method |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106717110A (en) * | 2014-09-03 | 2017-05-24 | 株式会社Ntt都科摩 | Wireless relay station |
| CN106717110B (en) * | 2014-09-03 | 2019-12-31 | 株式会社Ntt都科摩 | Wireless relay station |
| CN106817737A (en) * | 2016-12-22 | 2017-06-09 | 电信科学技术研究院 | The method and device that a kind of utilization mobile relay is switched over |
| CN106817737B (en) * | 2016-12-22 | 2019-03-08 | 电信科学技术研究院有限公司 | A kind of method and device switched over using mobile relay |
| CN110620607A (en) * | 2019-09-12 | 2019-12-27 | 无锡德思普科技有限公司 | System for enhancing data transmission by using mobile relay station |
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Application publication date: 20131113 |