CN101867945A - High-speed railway mobile network covering method based on distributed antenna and fixed switching channel - Google Patents
High-speed railway mobile network covering method based on distributed antenna and fixed switching channel Download PDFInfo
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- CN101867945A CN101867945A CN 201010195355 CN201010195355A CN101867945A CN 101867945 A CN101867945 A CN 101867945A CN 201010195355 CN201010195355 CN 201010195355 CN 201010195355 A CN201010195355 A CN 201010195355A CN 101867945 A CN101867945 A CN 101867945A
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Abstract
The invention belongs to the technical field of mobile communication, in particular disclosing a high-speed railway mobile network covering method based on a distributed antenna and a fixed switching channel. BBU+RRU radio frequency remote technology is adopted to conduct high-speed railway linear covering; N numbered channels are divided into a logic channel; N numbered RRUs cover a logic channel; a BBU corresponds to a logic channel; the adjacent part of two logic channels is independently provided with an RRU which is not only connected with the BBU corresponding to the previous logic channel, but also connected with the BBU corresponding to the next logic channel; the covered range of the independent RRU is defined to be the fixed switch channel, and fixed direction switching is completed by utilizing the fixed switching channel and the train operating direction at the edge of the channel. The switching process is simple in operation and has accurate, thus greatly lowering the probability of drop-call during switchover at the edge of the channel and avoiding ping-pong switchover of the channel.
Description
Technical field
The invention belongs to the mobile communication technology field, be specifically related to a kind of be applied to high-speed railway mobile network cover in the fixing method of switching cell.
Background technology
Along with the great development of high-speed railway, by 2010, the china railway revenue kilometres will reach 8.5 ten thousand kilometers, and wherein speed per hour 200km/h highway section reaches 6003km, and the F-Zero of Expressway between Beijing and Tianjin railway and Beijing-Shanghai express railway can reach more than the 350Km/h.Under this high-speed mobile scene, because the Doppler frequency shift influence, cell selecting all has the higher requirement of ratio with aspects such as gravity treatment, switchings.
A communication small area switching method suitable cell user commonly used at present is a situation static or low-speed motion, but when the community user major part is in high-speed motion state, as on high-speed railway, because station spacing is less, and train speed is very fast, train will shorten greatly by the time of sub-district so, therefore caused frequent sub-district to switch.Simultaneously, because the overlapping covered scope of minizone is fixed, then train shortened by the overlapping covered time thereupon, and switching time is constant substantially, and probability that therefore can successful switch just can decrease, and produces probability of call and will have rising.
Summary of the invention
In order to address the above problem, the present invention proposes based on the spaced antenna and the fixing high-speed railway mobile network covering method of switching cell, can adapt to the requirement that the development of high-speed railway covers and switches the mobile network well.
The technical scheme that the present invention takes is:
Based on the spaced antenna technology, adopt Remote Radio Unit (BBU)+baseband processing unit (RRU) radio frequency remote technology, carry out the high ferro wire and cover, enlarged cell range, reduced high-speed mobile user's sub-district switching frequency, promoted network performance.Simultaneously, utilize fixedly switching cell to finish the fixed orientation switching at the cell edge place.N microzonation is divided into a logic district, and N RRU covers a logic district, the corresponding logic district of BBU; At two logic district adjacent parts, a RRU is arranged separately, its both corresponding with previous logic district BBU links to each other, and corresponding with a back logic district again BBU links to each other, and the scope definition of its covering is fixing switching cell.The high ferro mobile communication terminal via the said fixing switching cell, and according to the directivity of train operation, carries out the orientation switching at fixing switching cell when crossing over different districts.The concrete counting statistics method that adopts is determined the logic district that is about to switch in orientation is switched.Fixedly the method for switching cell guarantees that directed hand-over process operations is simple, and switches accurately, greatly reduces the possibility that cell edge switches call drop, has avoided the table tennis of sub-district to switch.
The technical scheme that adopts the present invention to propose has following advantage:
1. wire covers effectively;
2. enlarge the sub-district and cover, reduce and switch;
3. fixedly switching cell switches;
4. directed handover operation process is simple, shortens handover delay;
5. disposable successful switch avoids table tennis to switch.
Description of drawings
Mobile network's covering method structural representation that Fig. 1 proposes for the present invention.
Embodiment
Adopt BBU+RRU to carry out networking, can effectively carry out wire and cover, reduce number of cells, increased the switching distance, prolonged switching interval, reduced switching times, promote network quality.
On this basis, introduce fixedly switching cell (Fixed Handover Cell), make the fixed-site that produces switching in specific sub-district (specific RRU place), simplify handoff procedure, the directed switching improved success rate for switching, reduction cell edge cutting off rate.
Fixedly switching cell specifically describes: at two logic district adjacent parts, a RRU is arranged separately, its both corresponding with previous logic district BBU links to each other, and corresponding with a back logic district again BBU links to each other, and the scope definition of its covering is fixing switching cell.
As shown in Figure 1, in the covering scheme of high-speed railway mobile network, adopt Remote Radio Unit (BBU)+baseband processing unit (RRU) to carry out networking, a plurality of RRU cover same logic district, be shown as N microzonation in the drawings and be divided into a logic district, N RRU covers a logic district, the corresponding logic district of BBU.At two logic district adjacent parts, a RRU is arranged separately, it is the RRU-N of corresponding previous logic district but also the RRU-1 ' of a corresponding back logic district not only, that is to say, it both linked to each other with the BBU-1 of previous logic district, BBU-2 with a back logic district links to each other again, and the scope definition of its covering is fixing switching cell.Be similar to the soft handover (Soft Handover) in the cdma system, when high ferro mobile communication terminal (UE) enters into fixedly switching cell, communicate between UE and the RRU, and this moment, RRU both linked to each other with previous BBU-1, link to each other with a back BBU-2 again, therefore UE keeps being connected with two BBU simultaneously, therefore also just keeps communicating by letter with two logic district simultaneously, has guaranteed the calling service quality at cell boarder place; Compare with the soft handover in the traditional cdma system, traditional soft handover can take more down channel resources, increase intrasystem signaling consumption, and in fixing switching cell, be to keep being connected, do not have more down channel resources and the extra signaling consumption problem of taking by a RRU and UE.In this case, have only when high ferro mobile communication terminal UE moves to fixedly switching cell just can produce switching, and will produce directed the switching, according to the unidirectional traveling characteristics of train.In the concrete switching of BBU, can adopt the method for counting statistics, current BBU-1 counts the RRU of the participation communication in this logic district, the statistics RRU number when obtaining each RRU communication.When UE moves to fixedly switching cell, the next BBU-2 that will switch has also obtained the work message of same RRU, and this moment BBU-2 the RRU of the participation communication in this logic district is counted is 1, less than the statistics RRU number of BBU-1, so we will to select BBU-2 be the logic district that is about to switch to.Fixedly the method for switching cell guarantees that directed hand-over process operations is simple, and switches accurately, greatly reduces the possibility that cell edge switches call drop, has avoided the table tennis of sub-district to switch.
Claims (3)
1. based on the spaced antenna and the fixing high-speed railway mobile network covering method of switching cell, it is characterized in that: adopt BBU+RRU radio frequency remote technology, carrying out the high ferro wire covers, N microzonation is divided into a logic district, N RRU covers a logic district, the corresponding logic district of BBU; At two logic district adjacent parts, a RRU is arranged separately, its both corresponding with previous logic district BBU links to each other, corresponding with a back logic district again BBU links to each other, the scope definition of its covering is fixing switching cell, utilizes fixedly switching cell to finish the fixed orientation switching at the cell edge place.
2. network coverage method according to claim 1 is characterized in that: the high ferro mobile communication terminal according to the directivity of train operation, carries out orientation at fixing switching cell and switches via the said fixing switching cell time.
3. network coverage method according to claim 1 and 2, it is characterized in that: the described directed counting statistics method that adopts of switching, specific as follows: current BBU counts the RRU of the participation communication in this logic district, statistics RRU number when obtaining each RRU communication, when the high ferro mobile communication terminal moves to fixedly switching cell, next BBU has also obtained the work message of same RRU, it is 1 that the RRU of the participation communication in this logic district is counted, less than the statistics RRU number of current BBU, the logic district that will select next BBU correspondence so is the logic district that is about to switch to.
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Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102130882A (en) * | 2011-04-14 | 2011-07-20 | 北京邮电大学 | OFDM (orthogonal frequency division multiplexing)-based high-speed rail mobile communication method and system |
| CN102271374A (en) * | 2011-09-14 | 2011-12-07 | 北京邮电大学 | Rapid switching method of TD-LTE (Time-division Duplex Long Term Evolution) communication system based on destination cell pre-load |
| CN102300274A (en) * | 2011-09-14 | 2011-12-28 | 北京邮电大学 | Geographical-position-information-based fast handover method for time-division duplex long term evolution (TD-LTE) system |
| WO2012159464A1 (en) * | 2011-05-23 | 2012-11-29 | 中兴通讯股份有限公司 | Radio frequency resource scheduling control method and device |
| CN103024841A (en) * | 2013-01-05 | 2013-04-03 | 浙江大学 | Position information and receiving beam forming based intelligent switching method for high-speed train communication system |
| CN103118408A (en) * | 2011-11-16 | 2013-05-22 | 普天信息技术研究院有限公司 | Small region measuring method and method, device and system of small region measuring and switching |
| CN103139789A (en) * | 2011-11-30 | 2013-06-05 | ***通信集团贵州有限公司 | Network coverage method of continuous tunnel in high-speed scene |
| CN103220682A (en) * | 2012-01-18 | 2013-07-24 | 普天信息技术研究院有限公司 | Antenna selection method and device in data transmission process |
| CN103491581A (en) * | 2013-09-27 | 2014-01-01 | 北京邮电大学 | Optimum switching reference point selecting method based on high speed railway fixed-point switching algorithm |
| CN103931224A (en) * | 2013-11-11 | 2014-07-16 | 华为技术有限公司 | Device and method realizing interweaving redundancy coverage |
| CN105812301A (en) * | 2014-12-27 | 2016-07-27 | 华为技术有限公司 | Communication method, device and system |
| CN105846889A (en) * | 2014-10-24 | 2016-08-10 | 郭建 | High-speed train-ground communication system with distributed antennas for high-speed rail |
| CN106028352A (en) * | 2016-05-12 | 2016-10-12 | 西南交通大学 | Wireless detection and communication integrated area danger early-warning system and method |
| CN108616803A (en) * | 2016-12-21 | 2018-10-02 | ***通信集团湖北有限公司 | The localization method and device of high ferro user |
| CN108777875A (en) * | 2018-05-21 | 2018-11-09 | 北京北方烽火科技有限公司 | A kind of method for processing business and device |
| CN109462873A (en) * | 2018-11-15 | 2019-03-12 | 武汉虹信通信技术有限责任公司 | A kind of optimization method of communication-based train control system pingpang handoff |
| CN109756904A (en) * | 2019-01-25 | 2019-05-14 | 哈尔滨工业大学（深圳） | A kind of 5G super-intensive wireless access network deployment system and its virtual subdistrict update method |
| CN110290501A (en) * | 2019-07-08 | 2019-09-27 | 北京交通大学 | Consider land mobile communication system wireless coverage reinforcement in the vacuum tube of fault condition |
| CN111148133A (en) * | 2019-12-09 | 2020-05-12 | 中国联合网络通信集团有限公司 | Method and equipment for expanding capacity of indoor distribution system |
| CN112888034A (en) * | 2019-11-29 | 2021-06-01 | ***通信集团山东有限公司 | Directional switching method, device, storage medium and base station |
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|---|---|---|---|---|
| CN102130882A (en) * | 2011-04-14 | 2011-07-20 | 北京邮电大学 | OFDM (orthogonal frequency division multiplexing)-based high-speed rail mobile communication method and system |
| WO2012159464A1 (en) * | 2011-05-23 | 2012-11-29 | 中兴通讯股份有限公司 | Radio frequency resource scheduling control method and device |
| CN102271374A (en) * | 2011-09-14 | 2011-12-07 | 北京邮电大学 | Rapid switching method of TD-LTE (Time-division Duplex Long Term Evolution) communication system based on destination cell pre-load |
| CN102300274A (en) * | 2011-09-14 | 2011-12-28 | 北京邮电大学 | Geographical-position-information-based fast handover method for time-division duplex long term evolution (TD-LTE) system |
| CN103118408B (en) * | 2011-11-16 | 2016-02-17 | 普天信息技术研究院有限公司 | Method, the Apparatus and system of cell measuring method, cell measurement and switching |
| CN103118408A (en) * | 2011-11-16 | 2013-05-22 | 普天信息技术研究院有限公司 | Small region measuring method and method, device and system of small region measuring and switching |
| CN103139789A (en) * | 2011-11-30 | 2013-06-05 | ***通信集团贵州有限公司 | Network coverage method of continuous tunnel in high-speed scene |
| CN103220682A (en) * | 2012-01-18 | 2013-07-24 | 普天信息技术研究院有限公司 | Antenna selection method and device in data transmission process |
| CN103220682B (en) * | 2012-01-18 | 2016-05-11 | 普天信息技术研究院有限公司 | Antenna selecting method when transfer of data and device |
| CN103024841A (en) * | 2013-01-05 | 2013-04-03 | 浙江大学 | Position information and receiving beam forming based intelligent switching method for high-speed train communication system |
| CN103024841B (en) * | 2013-01-05 | 2015-12-23 | 浙江大学 | The intelligent switch method that in bullet train communication system, position-based information and received beam are shaped |
| CN103491581A (en) * | 2013-09-27 | 2014-01-01 | 北京邮电大学 | Optimum switching reference point selecting method based on high speed railway fixed-point switching algorithm |
| WO2015066928A1 (en) * | 2013-11-11 | 2015-05-14 | 华为技术有限公司 | Device and method for implementing interwoven redundant coverage |
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| CN103931224B (en) * | 2013-11-11 | 2018-03-02 | 华为技术有限公司 | A kind of device and method for realizing interleaving redundant covering |
| CN105846889A (en) * | 2014-10-24 | 2016-08-10 | 郭建 | High-speed train-ground communication system with distributed antennas for high-speed rail |
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| CN109462873A (en) * | 2018-11-15 | 2019-03-12 | 武汉虹信通信技术有限责任公司 | A kind of optimization method of communication-based train control system pingpang handoff |
| CN109462873B (en) * | 2018-11-15 | 2020-12-01 | 武汉虹信科技发展有限责任公司 | Communication-based train control system ping-pong switching optimization method |
| CN109756904A (en) * | 2019-01-25 | 2019-05-14 | 哈尔滨工业大学（深圳） | A kind of 5G super-intensive wireless access network deployment system and its virtual subdistrict update method |
| CN109756904B (en) * | 2019-01-25 | 2022-02-01 | 哈尔滨工业大学（深圳） | 5G ultra-dense wireless access network deployment system and virtual cell updating method thereof |
| CN110290501A (en) * | 2019-07-08 | 2019-09-27 | 北京交通大学 | Consider land mobile communication system wireless coverage reinforcement in the vacuum tube of fault condition |
| CN112888034A (en) * | 2019-11-29 | 2021-06-01 | ***通信集团山东有限公司 | Directional switching method, device, storage medium and base station |
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