CN1568055A - A networking method for time division duplexing mode cellular network - Google Patents
A networking method for time division duplexing mode cellular network Download PDFInfo
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Abstract
本发明公开一种时分双工模式蜂窝网组网的方法，该蜂窝网中的小区通过帧来收发业务，该方法还包括：相邻的蜂窝网小区采用具有相同时隙结构的帧来收发业务。该方法解决了相邻小区交互的地方存在的移动台与移动台，移动台与基站，基站与基站之间的严重相互干扰问题，从而在根本上实现时分双工模式蜂窝网的组网。
The invention discloses a cellular network networking method in a time-division duplex mode. Cells in the cellular network transmit and receive services through frames, and the method also includes: adjacent cells of the cellular network use frames with the same time slot structure to transmit and receive services . This method solves the serious mutual interference problem between the mobile station and the mobile station, the mobile station and the base station, and the base station and the base station in the place where the adjacent cells interact, thereby fundamentally realizing the networking of the time division duplex mode cellular network.
Description
Technical field
The present invention relates to the networking technology of time division duplex (TDD) pattern, the method for particularly a kind of tdd mode Cellular Networks networking.
Background technology
Development along with communication network, people no longer have been satisfied with by computer access communications network, but the connection processing miscellaneous service can both be carried out with communication network in any place of hope realization, as reception and send Email, carry out business such as network browsing and file download, therefore, third generation communication network (3G) has grown up.
TDD is one of standard of 3G network, in the mobile communication system of tdd mode, receive and send professional different time-gap at same frequency channels, receive and transmit signal respectively with disengaging time, characteristics with mobile communication system of tdd mode are: do not need paired frequency, can use various frequency resources, be applicable to asymmetric up-downgoing transfer of data frequency; The availability of frequency spectrum is higher, and the correlation of up-downgoing resource is big; When carrying out the sub-district switching, adopt direct-cut operation.
Time division multiplexing-S-CDMA (TD-SCDMA) system is a kind of network construction form of tdd mode, below with the Cellular Networks networking of TD-SCDMA system for example.
Be a key technology of TD-SCDMA system synchronously, can suppress the interference of TD-SCDMA system accurately synchronously greatly.The TD-SCDMA system transmits data with frame, and the frame of TD-SCDMA system is the time interval of adopting 10ms, and a frame can be divided into the subframe of two 5ms.As shown in Figure 1, Fig. 1 is the structure of time slot figure of a subframe, and its specific descriptions are:
The spreading rate of a subframe of TD-SCDMA system is 1.28Mchip/s, and a subframe is held 6400 chips altogether.Each subframe is divided into 7 time slot: TS0, TS1 ... TS6 has three special time slot: DwPTS, GP and UpPTS in addition, and these three special time slots are in order to guarantee the synchronous of TD-SCDMA system.These three special time slots have 352 chips, and wherein DwPTS has 96 chips, are following synchronization fields; GP has 96 chips, is quarantine domain; UpPTS has 160 chips, is to go up synchronization field.7 time slots of TS0～TS6 are data field time slots, 864 chips of each time slot, wherein, TS0 is forced to be assigned as descending time slot, TS1 is forced to be assigned as ascending time slot, TS2～TS6 can be assigned as the upstream or downstream time slot arbitrarily, but in a subframe two transfer points (SwitchingPoint) can only be arranged.
As shown in Figure 2, Fig. 2 is the subframe structure of time slot figure of symmetrical distribution time slot, and its specific descriptions are: TS2, TS3 are set to ascending time slot, and TS4, TS5 and TS6 are set to descending time slot.
As shown in Figure 3, Fig. 3 is the subframe structure of time slot figure with asymmetric distribution time slot, and its specific descriptions are: TS2, TS3 and TS4 are set to ascending time slot, and TS5 and TS6 are set to descending time slot.
When setting up the Cellular Networks of TD-SCDMA, as shown in Figure 4, Fig. 4 is the Cellular Networks networking structure figure of TD-SCDMA: this Cellular Networks is made up of several cellular zones, as: cell1, cell2 ..., celln, the carrier frequency that each cellular zone is set is f1, and wherein, cell1 is adjacent with other six cell.On carrier frequency f1, the subframe time slot of cell1 is assumed to be the described structure of time slot of Fig. 2; The subframe time slot of cell2 is assumed to be the described structure of time slot of Fig. 3.
Because cell1 is different with the subframe structure of time slot of cell2, and cell1 and cell2 are adjacent, when the travelling carriage of registering at cell1 enters the mutual mutually sub-district of cell1 and cell2, the subframe structure of time slot of this travelling carriage is just inequality with the structure of time slot of the base station of cell2 and travelling carriage, when this travelling carriage transmitting and receiving service, base station in the cell2 sub-district and travelling carriage will cause serious to this travelling carriage, the interference that can not suppress.
This shows that when the Cellular Networks networking of TD-SCDMA system, if the structure of time slot difference between the neighbor cell, the mutual place of neighbor cell just will exist travelling carriage and travelling carriage, the serious mutual interference mutually between travelling carriage and the base station, base station and base station.When serious interference, just can not realize the Cellular Networks networking of TD-SCDMA system.
Summary of the invention
In view of this, the invention provides the method for a kind of tdd mode Cellular Networks networking, this method has solved the mutual interference problem between the different neighbor cells when the tdd mode Cellular Networks is carried out networking, has realized the networking of tdd mode Cellular Networks.
According to above-mentioned purpose, technical scheme of the present invention is achieved in that
The method of a kind of TDD mode Cellular Networks networking is characterized in that, this method comprises: adjacent Cellular Networks sub-district adopts the frame with identical structure of time slot to come transmitting and receiving service.
When the business that will receive and dispatch when being main with speech business, described frame with identical time slot adopts the structure of time slot of symmetry.
When the business that will receive and dispatch when being main with data service, described frame with identical time slot adopts asymmetric structure of time slot.
What adopted described Cellular Networks sub-district is identical frequency carrier wave base station transceiver business.
Method provided by the invention, the cellular cell that the tdd mode Cellular Networks is adjacent selects for use the frame with identical structure of time slot to come transport service according to business need, travelling carriage and travelling carriage that the mutual place of adjacent cells exists have been solved, travelling carriage and base station, serious interference problem mutually between base station and the base station, thereby in the networking that fundamentally realizes the tdd mode Cellular Networks.
Description of drawings
Fig. 1 is the structure of time slot figure of a subframe.
Fig. 2 is the subframe structure of time slot figure of symmetrical distribution time slot.
Fig. 3 is the subframe structure of time slot figure with asymmetric distribution time slot.
Fig. 4 is the Cellular Networks networking structure figure of TD-SCDMA.
Fig. 5 a is the figure of subframe structure of time slot one.
Fig. 5 b is the figure of subframe structure of time slot two.
Fig. 5 c is the figure of subframe structure of time slot three.
Fig. 6 is the schematic diagram of two adjacent TD-SCDMA Cellular Networks sub-districts.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage are clearer, by the following examples and with reference to accompanying drawing, the present invention is described in more detail.
Present embodiment adopts the TD-SCDMA system to illustrate method provided by the invention.
Method provided by the invention, the cellular zone that the TD-SCDMA Cellular Networks is adjacent selects for use the frame with identical structure of time slot to come transport service, in order to solve travelling carriage and travelling carriage in mutual each the different adjacent cells of place of neighbor cell, the serious problem of mutual interference mutually between travelling carriage and the base station, base station and base station.
Because frame is made of subframe, so method essence provided by the invention is for to select for use the subframe with identical structure of time slot to come transport service TD-SCDMA Cellular Networks adjacent areas.
The TD-SCDMA system can adopt the Cellular Networks sub-district five kinds of subframe structure transport services, and wherein two kinds of subframe structures are as described in Fig. 2 and Fig. 3, and other three kinds is that Fig. 5 a, Fig. 5 b and Fig. 5 c are described.
Fig. 5 a is the figure of subframe structure of time slot one, and its specific descriptions are: TS2, TS3, TS4, TS5 and TS6 are set to descending time slot.
Fig. 5 b is the figure of subframe structure of time slot two, and its specific descriptions are: TS2 is set to ascending time slot, and TS3, TS4, TS5 and TS6 are set to descending time slot.
Fig. 5 c is the figure of subframe structure of time slot three, and its specific descriptions are: TS2, TS3, TS4 and TS5 are set to ascending time slot, and TS6 is set to descending time slot.
As shown in Figure 6, Fig. 6 is the schematic diagram of two adjacent TD-SCDMA Cellular Networks sub-districts, wherein, travelling carriage M1, M2 are registered among the cell1, adopt the structure of time slot transmitting and receiving service of cell1, travelling carriage M3, M4 are registered among the cell2, adopt the structure of time slot transmitting and receiving service of cell2.The structure of time slot of supposing cell1 as described in Figure 2, the structure of time slot of supposing cell2 as described in Figure 3, when travelling carriage M1 and travelling carriage M3 are in the overlapping area of coverage of cell1 and cell2, M1 is in downstream state when the TS4 time slot, and M3 is in uplink state when the TS4 time slot, travelling carriage M1 will cause serious interference to M3, therefore, cell1 adopts identical structure of time slot with cell2, base station among cell1 and the cell2, travelling carriage also just adopts identical structure of time slot, when the travelling carriage among the cell1 during at the mutual regional transmitting and receiving service of cell1 and cell2, travelling carriage among the cell2 and base station just can not produce this travelling carriage and disturb, and realize the networking of TD-SCDMA.
TD-SCDMA Cellular Networks neighbor cell adopts identical structure of time slot transport service, and this structure of time slot is selected for use according to different business: when transport service when being main with speech business, adopt the structure of time slot of symmetrical distribution time slot, i.e. the described structure of Fig. 2; When upstream data service for a long time, can adopt Fig. 3, the described structure of Fig. 5 c; When the downlink data business for a long time, can adopt Fig. 5 a and the described structure of Fig. 5 b.
The frame structure that adopt the Cellular Networks sub-district should meet the frame structure standard of 3GPP low rate TDD.
Below with specific embodiment the present invention is described:
Cellular Networks of the present invention adopts the carrier wave base station transceiver business of identical frequency.
If certain base station is TD-SCDMA Node B base station, when this base station covers whole Cellular Networks, this Cellular Networks comprises a plurality of cellular cells, then can be according to business need, selection meet one of the TD-SCDMA protocol requirement fixedly structure of time slot as the frame structure of this base station, as based on speech business, then select the time slot frame structure of symmetry, as based on data service, then can be according to the asymmetry of up-downgoing business, by selecting transfer point (Switching Point), select the frame structure of ascending time slot, or select the frame structure of descending time slot more than ascending time slot more than descending time slot.Perhaps do not select fixedly structure of time slot according to the dynamic change of business, to select transfer point in real time, satisfy professional needs as the frame structure of this base station.
When this base station only covers Cellular Networks sub-district in the TD-SCDMA beehive net, the fixedly frame of structure of time slot must be selected to have in this base station, when satisfy suppressing beehive net between a plurality of adjacent cells the base station to the base station, travelling carriage is to the base station, and travelling carriage is to the serious interference problem between the travelling carriage.This base station must be according to business need, selection meet one of the TD-SCDMA protocol requirement fixedly structure of time slot as the frame structure of this base station, as based on speech business, then select the time slot frame structure of symmetry, as based on data service, then can be according to the asymmetry of up-downgoing business, by selecting transfer point (Switching Point), select the frame structure of ascending time slot, or select the frame structure of descending time slot more than ascending time slot more than descending time slot.After selecting the structure of time slot of frame, other cellular cells of all beehive nets all are made as this structure of time slot, thereby the structure of time slot of finishing this base station cellular cell frame structure when beehive net distributes.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being made within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1, the method for a kind of TDD mode Cellular Networks networking is characterized in that, this method comprises: adjacent Cellular Networks sub-district adopts the frame with identical structure of time slot to come transmitting and receiving service.
2, the method for claim 1 is characterized in that, when the business that will receive and dispatch when being main with speech business, described frame with identical time slot adopts the structure of time slot of symmetry.
3, the method for claim 1 is characterized in that, when the business that will receive and dispatch when being main with data service, described frame with identical time slot adopts asymmetric structure of time slot.
4, the method for claim 1 is characterized in that, what adopted described Cellular Networks sub-district is identical frequency carrier wave base station transceiver business.
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| CN 03148655 CN1568055A (en) | 2003-06-12 | 2003-06-12 | A networking method for time division duplexing mode cellular network |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009103234A1 (en) * | 2008-02-18 | 2009-08-27 | 中兴通讯股份有限公司 | Configuration method and device for time division duplex modes between cells based on tdd system |
| WO2010015206A1 (en) * | 2008-08-07 | 2010-02-11 | 大唐移动通信设备有限公司 | Method and apparatus for determining resources usage mode of cells |
| CN1960211B (en) * | 2005-11-04 | 2011-03-16 | 上海原动力通信科技有限公司 | Method and application for reducing coexistent interference of time division duplexing system in different frame structure |
| CN1960210B (en) * | 2005-11-04 | 2011-06-22 | 上海原动力通信科技有限公司 | Method and application for reducing coexistent interference of time division duplexing system in different frame structure |
| CN1929338B (en) * | 2005-09-06 | 2011-08-24 | 都科摩（北京）通信技术研究中心有限公司 | Convergence method and equipment of cellular network and ubiquitous network |
| CN101527594B (en) * | 2008-03-05 | 2012-11-28 | 中兴通讯股份有限公司 | Method and device for removing interference between cells based on time division duplex wireless communication system |
| CN101527593B (en) * | 2008-03-05 | 2013-01-16 | 中兴通讯股份有限公司 | Method and device for removing interference between cells based on time division duplex wireless communication system |
| CN105376825A (en) * | 2014-08-25 | 2016-03-02 | 联想(北京)有限公司 | System control method, base station and system |
-
2003
- 2003-06-12 CN CN 03148655 patent/CN1568055A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1929338B (en) * | 2005-09-06 | 2011-08-24 | 都科摩（北京）通信技术研究中心有限公司 | Convergence method and equipment of cellular network and ubiquitous network |
| CN1960211B (en) * | 2005-11-04 | 2011-03-16 | 上海原动力通信科技有限公司 | Method and application for reducing coexistent interference of time division duplexing system in different frame structure |
| CN1960210B (en) * | 2005-11-04 | 2011-06-22 | 上海原动力通信科技有限公司 | Method and application for reducing coexistent interference of time division duplexing system in different frame structure |
| WO2009103234A1 (en) * | 2008-02-18 | 2009-08-27 | 中兴通讯股份有限公司 | Configuration method and device for time division duplex modes between cells based on tdd system |
| US8605676B2 (en) | 2008-02-18 | 2013-12-10 | Zte Corporation | Method and device for configuring inter-cell time division duplex modes based on a TDD system |
| CN101527594B (en) * | 2008-03-05 | 2012-11-28 | 中兴通讯股份有限公司 | Method and device for removing interference between cells based on time division duplex wireless communication system |
| CN101527593B (en) * | 2008-03-05 | 2013-01-16 | 中兴通讯股份有限公司 | Method and device for removing interference between cells based on time division duplex wireless communication system |
| WO2010015206A1 (en) * | 2008-08-07 | 2010-02-11 | 大唐移动通信设备有限公司 | Method and apparatus for determining resources usage mode of cells |
| CN105376825A (en) * | 2014-08-25 | 2016-03-02 | 联想(北京)有限公司 | System control method, base station and system |
| CN105376825B (en) * | 2014-08-25 | 2019-12-24 | 联想(北京)有限公司 | System control method, base station and system |
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