CN101754477A - Communication system volume expansion method - Google Patents
Communication system volume expansion method Download PDFInfo
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- CN101754477A CN101754477A CN200810227679A CN200810227679A CN101754477A CN 101754477 A CN101754477 A CN 101754477A CN 200810227679 A CN200810227679 A CN 200810227679A CN 200810227679 A CN200810227679 A CN 200810227679A CN 101754477 A CN101754477 A CN 101754477A
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Abstract
The invention discloses a communication system volume expansion method, which belongs to the wireless communication field. The method comprises the following steps: firstly, determining the relative position information of each base station and adjacent base stations; determining the position information and the signal channel quality information of a mobile terminal in a subdistrict through received up-running signals; then, coordinating a forward wave beam between adjacent subdistricts at a next down-running time interval by each base station according to the relative position information, the mobile terminal position information and the signal channel quality information to avoid the interference between the forward wave beams of the adjacent subdistricts; and finally, carrying out the wave beam molding for sending the coordinated forward wave beam as the down-running signals. At the same time, the invention adds an antenna patch in the base station, and the antenna patch is used for receiving the up-running signals for further expanding the volume. Compared with the prior art, the invention can avoid the interference between the signal wave beams, can improve the frequency spectrum utilization rate and the system volume, and simultaneously realizes the transmission of the up-running and down-running data at the same frequency and the same time interval is realized through adding the antenna patch, so the system volume is further and greatly improved.
Description
Technical field
The present invention relates to a kind of expansion method that is applied to communication system, purpose is to avoid or reduces interference between signal beam, improves the availability of frequency spectrum, and enlarges power system capacity; Be applicable to wireless communication field.
Background technology
A basic task of wireless communication system is the communication link between foundation and maintenance wireless terminal and base station, realizes the transmitted in both directions of communication data, by the link of base station biography toward the wireless terminal direction, is called forward direction (or descending) link; Pass toward the link of base station direction by wireless terminal, be called oppositely (or up) link.According to the difference of duplex mode, communication system generally is divided into time division duplex (TDD) system and Frequency Division Duplexing (FDD) (FDD) system.
The TDD system adopts same frequency to carry out up, downlink transmission, and utilizes different time-gap to isolate interference between up, the down link, and promptly the base station receives only and do not launch in ascending time slot, and the base station is only launched and do not received in descending time slot.And the FDD system, receive and dispatch simultaneously the base station, distinguishes the uplink and downlink link with different frequencies, generally needs the frequency spectrum resource of symmetry.Existing mobile communication gsm system belongs to the FDD system and the TD-SCDMA system belongs to the TDD system.
In order to improve the availability of frequency spectrum, reduce co-channel interference, and enlarge power system capacity, in communication system, introduced signal beam forming technique (for example: intelligent antenna technology, MIMO technology etc.), make signal beam can point to the user that need communicate by letter.At present, remove to distribute the forward direction wave beam, can avoid the inter-beam interference of inside, same sub-district, but the wave beam of neighbor cell may bump, produce big co-channel interference (as shown in Figure 1, wave beam 1 and wave beam 2 bump) according to the user of different angles in the sub-district.
Summary of the invention
The present invention proposes a kind of communication system volume expansion method, and it makes the wave beam of neighbor cell not bump by forward direction (being sent by the base station) wave beam is controlled, planned and coordinates, and realizes hiding between the wave beam.The final reduction inter-signal interference that realizes improves the availability of frequency spectrum, enlarges the purpose of power system capacity.This technology both had been suitable for the TDD system, also was suitable for the FDD system.
The present invention hides on the basis of technology in forward wave beam control system, reintroduces a kind of antenna patching technology, further improves power system capacity, claims among the present invention that the reception antenna of only being responsible for the reception upward signal that is connected with the base station is the antenna patch.The uplink and downlink of tradition homogenous frequency signal are distinguished by different time-gap, and in the sub-district be not fully used in the vacant zone between the wave beam.The present invention does not have forward direction wave beam or the very weak interior antenna patch in zone of forward direction wave beam influence to receive upward signal by increasing the technology of antenna patch in the sub-district, make to be in.This just can be in descending time slot, antenna for base station transmitting downstream signal, and the antenna patch inserts upward signal simultaneously, realizes with uplink and downlink signals in the sub-district with transmission simultaneously frequently.
The present invention controls and coordinates the zone and the direction of forward direction wave beam formation in each sub-district by forward wave beam control system technology, avoids the interference between the neighbor cell wave beam, thereby reduces inter-signal interference, the raising availability of frequency spectrum and power system capacity.On the basis of forward wave beam control system technology,, further improve power system capacity by increasing the antenna patching technology.Concrete steps are as follows:
At first, determine relative position information between neighbor cell base station and the base station.The adjacent base station position is more fixing, just can determine when the base station is set, and perhaps determines by cable, fiber optic cable communications between the base station.
In second step, obtain the positional information of the mobile terminal that need communicate by letter this sub-district.The base station is by receiving the upward signal of mobile terminal, definite positional information and channel quality information that needs the mobile terminal of communication from upward signal.
The 3rd step, coordinate the forward direction wave beam between next time slot neighbor cell, hide the forward direction inter-beam interference.Each cell base station goes on foot position, mobile terminal and the channel quality information that obtains according to the base station position information and second that the first step obtains, carry out the coordination before the forward direction beam transmission between next time slot neighbor cell, parameters such as the direction by control forward direction wave beam, intensity avoid adjacent sub-district with beam interference frequently.Provide two kinds in the embodiment and concrete hidden scheme.
In the 4th step, beam shaping produces the forward direction wave beam after coordinating, transmission of downlink signal.Finish the coordination of the forward direction wave beam that will launch by the 3rd step, made the adjacent cell forward wave beam that may produce interference can coordinate to hide.In case the downlink time slot arrives, each cell forward wave beam is finished the emission of downstream signal according to the mode excipient emission of having coordinated.
The 5th step, the enforcement of antenna patch.On the basis of forward wave beam control system, some antenna patches that link to each other with the base station that distribute in the sub-district are as receiving upward signal.When detecting the forward direction wave beam (being downstream signal) that sends the base station, some antenna patch wherein disturb when strong (greater than the interference threshold set time) then not insert upward signal to antenna patch itself, and unmatchedly it is disturbed when more weak (less than the interference threshold set time) to beam interference or forward direction wave beam when the antenna patch detects, then insert upward signal.Make that like this in the descending time slot of cell base station, the antenna patch can insert upward signal, realize that uplink and downlink signals is with transmission simultaneously frequently.
In sum, technical scheme of the present invention is as follows:
A kind of communication system volume expansion method the steps include:
1) adjacent with it base station relative position information is determined in each base station;
2) positional information and the channel quality information of mobile terminal in this sub-district determined in the base station by the upward signal that receives;
3) the forward direction wave beam between next descending time slot neighbor cell is coordinated, the interference of hiding neighbor cell forward wave interfascicular according to adjacent base station relative position information, the positional information and the channel quality information of mobile terminal in each base station;
4) beam shaping is launched the forward direction wave beam after coordinating as downstream signal.
Described base station connects one or more antenna patches, is used to receive the upward signal of mobile terminal in the sub-district.
The method of work of described antenna patch is: whether the suffered signal interference value of antenna patch detection itself greater than the interference threshold of setting, if suffered signal interference value is greater than the interference threshold of setting then ignore the upward signal that receives; If suffered signal interference value is less than the interference threshold of setting then the upward signal that receives is sent to the base station.
Include but not limited in the described method that following one or more methods coordinate the forward direction wave beam between next descending time slot neighbor cell, the interference of hiding neighbor cell forward wave interfascicular: coordinate the forward direction wave beam between next descending time slot neighbor cell transmitting power, coordinate the transmit direction of the forward direction wave beam between next descending time slot neighbor cell.
Described by coordinating the transmitting power of the forward direction wave beam between next descending time slot neighbor cell, the method for hiding the interference of neighbor cell forward wave interfascicular is:
1) base station is according to described adjacent base station relative position information, the positional information of mobile terminal and the direction that channel quality information is determined next this cell forward of descending time slot wave beam;
2) judge in this sub-district the forward direction wave beam whether with neighbor cell in forward direction beam position the same area, if there is the forward direction wave beam that points to the same area, then dwindle the transmitting power of this forward direction wave beam in this sub-district or the neighbor cell, control forward wave beam diameter is to coverage;
3) alternately adjust the size of two forward wave beam diameters in the same zone of sensing according to descending time slot between the adjacent base station to coverage.
Described by coordinating the transmit direction of the forward direction wave beam between next descending time slot neighbor cell, the method for hiding the interference of neighbor cell forward wave interfascicular is:
1) each microzonation is divided into several sectors; The opening direction correspondence of described sector in each sub-district is identical;
2) will be positioned at the forward direction wave beam of same sector in each sub-district as the armed forward direction wave beam of same time slot;
3) the forward direction wave beam in the identical sector of an opening direction is launched in each sub-district in same descending time slot;
4) forward direction beam transmission sector, the whole sub-district of searching loop are rotated according to descending time slot in each sub-district.
In the described method, each sub-district receives the mobile terminal upward signal at ascending time slot, upgrades the positional information and the channel quality information of mobile terminal in each sector, thereby upgrades armed forward direction wave beam in each sector.
In the described method, the positional information between the base station is determined described adjacent base station relative position information by the cable between the base station, optical cable or when the base station is set.
Good effect of the present invention is:
Compared with prior art, interference, the raising availability of frequency spectrum and power system capacity between signal beam can be avoided or reduce to forward wave beam control system technology of the present invention.On the basis of this control technology, the present invention also proposes a kind of antenna patching technology, realizes that up, downlink data same frequency transmits with time slot, makes the availability of frequency spectrum and power system capacity further significantly improve.
Description of drawings
Fig. 1. be traditional forward direction beam allocation schematic diagram;
Fig. 2 is overall flow figure of the present invention;
Fig. 3. for coordinating the power of forward direction wave beam, hide wave beam phase mutual interference schematic diagram;
Fig. 4. be the little zone of forward direction beam interference, the antenna patch receives the upward signal schematic diagram;
Fig. 5. for planning forward direction wave beam appears in the sector, hide wave beam phase mutual interference schematic diagram;
Fig. 6. in forward direction wave beam quiescent region, the antenna patch receives the upward signal schematic diagram.
Embodiment
Describe the specific embodiment of the present invention in detail below in conjunction with accompanying drawing, integrated operation flow process of the present invention, as shown in Figure 2.
Embodiment one:
At first, the positional information between the acquisition neighbor cell base station.The adjacent base station position is more fixing, and the positional information when the base station is set between the base station is just definite substantially, perhaps determines by the cable between the base station, optical cable transmission signals.
In second step, obtain mobile terminal positional information and channel quality information.By the upward signal that receives, obtain the positional information and the channel quality information of mobile terminal.
The 3rd step, plan and coordinate forward direction wave beam transmitting power between next time slot neighbor cell, hide the forward direction inter-beam interference.The base station of each sub-district is from the first step and can obtain the positional information of adjacent base station around it second step, and the position, mobile terminal and the channel quality information that need communication, and the direction of its wave beam that will launch of next time slot just can be known in the base station.In case neighbor cell base station is found the forward direction wave beam of next time slot and will be pointed to same zone, may disturb.To select to insert the position, mobile terminal by coordinating between these two sub-districts so, the base station is controlled beam coverage separately, thereby is hidden interference according to mobile terminal position adjustments transmitting power size simultaneously.As shown in Figure 3, wave beam 1 and wave beam 2 directions sensing the same area may disturb.Pass through between the base station so to coordinate, in this descending time slot, the wave beam 1 of base station 1 inserts from his nearer mobile terminal (for example: only access is in cell base station radius 3/5 with interior mobile terminal) earlier, the wave beam 2 of base station 2 inserts from his mobile terminal far away (for example: only access is in the mobile terminal that radius of society 3/5 arrives cell edge in addition), the beam power of wave beam 2 emissions in the base station 2 is bigger at this moment, and the beam power of wave beam 1 emission in the base station 1 is less, has so just avoided phase mutual interference between wave beam; And at next descending time slot, then allow the wave beam 1 of base station 1 insert from his mobile terminal far away, the wave beam 2 of base station 2 inserts nearer mobile terminal, and the launching beam power of wave beam 1 is bigger in the base station 1 at this moment, the transmitting power of wave beam 2 is less in the base station 2, phase mutual interference between the wave beam of also avoiding.Wave beam 1 and wave beam 2 watt levels replace by descending time slot, thereby hide mutual interference.
In the 4th step, beam shaping produces the forward direction wave beam after coordinating, transmission of downlink signal.Finish the coordination of the forward direction wave beam that will launch by the 3rd step, made the adjacent cell forward wave beam that may produce interference can coordinate to hide.When the downlink time slot arrived, each cell forward wave beam was finished the emission of downstream signal according to the mode excipient emission of having coordinated.
The 5th step increased the antenna patching technology, further improved the availability of frequency spectrum and power system capacity.Some antenna patches that link to each other with the base station of distribution in the sub-district are as receiving upward signal.The signal that the antenna patch receives has mixed descending and upward signal, and the downstream signal that send the base station is to disturb for the antenna patch.When detecting this interference value less than the interference threshold value, the antenna patch (occurs in generally that the forward direction wave beam does not have or very weak zone, here be referred to as " forward direction quiescent region "), the antenna patch just can receive upward signal, and sends this cell base station to by cable or optical cable.Make that like this antenna patch can insert upward signal in the downlink time slot of base station, realize with duplexing simultaneously frequently.As shown in Figure 4, the zone that the forward direction beam interference is little (being the forward direction quiescent region), the antenna patch receives upward signal.
Embodiment two:
At first, the positional information between the acquisition neighbor cell base station.The adjacent base station position is more fixing, and the positional information when the base station is set between the base station is just definite substantially, perhaps determines by the cable between the base station, optical cable transmission signals.
In second step, obtain the mobile terminal positional information.By the upward signal that receives, obtain the positional information and the channel quality information of mobile terminal.
The 3rd step, the direction that next the time slot forward direction wave beam in each sub-district of planning control forms, the realization wave beam is hidden.
A) cell sectorization.Cell sectorization, each sub-district is that the center is divided into several sectors with the base station earlier.Situation when as shown in Figure 5, having provided 3 sectors.
B) coordinate the forward direction beam zone.The downlink wave beam of each sub-district is all concentrated within the sector, here be referred to as " forward direction beam zone ", coordinate the position of forward direction beam zone in each sub-district, make in the same time slot, the forward direction wave beam of each sub-district all concentrates in the identical sector of opening direction, thereby avoids the collision of the forward wave interfascicular of each sub-district.As shown in Figure 5, provided the situation that the planning of forward direction wave beam was coordinated when each microzonation was divided into 3 sectors.
In the 4th step, beam shaping produces the forward direction wave beam after coordinating, transmission of downlink signal.Finish the coordination of the forward direction wave beam that will launch by the 3rd step, made the adjacent cell forward wave beam that may produce interference can coordinate to hide.When the downlink time slot arrived, each cell forward wave beam was finished the emission of downstream signal according to the mode excipient emission of having coordinated.
Like this, before each next downlink time slot arrives, after information, the 3rd step will be coordinated forward direction beam zone each sub-district in and be carried out simultaneously clockwise or rotate counterclockwise next sector by first and second collection step, simultaneously downstream signal be carried out in next sector and transmit and serve.Rotate the forward direction beam zone according to time slot, make the forward direction beam zone can the whole sub-district of searching loop, guaranteed that the mobile terminal of each position can both obtain favorable service in the sub-district.
The 5th step increased the antenna patching technology, further improved the availability of frequency spectrum and power system capacity.Some antenna patches that link to each other with the base station of distribution in the sub-district are as receiving upward signal.The signal that the antenna patch receives has mixed descending and upward signal, and the downstream signal that send the base station is to disturb for the antenna patch.In the forward direction quiescent region, when the antenna patch detected this interference value less than the interference threshold value, the antenna patch just can insert upward signal, and sent this cell base station to by cable or optical cable.Make that like this antenna patch can insert upward signal in the downlink time slot of base station, realize with duplexing simultaneously frequently.As shown in Figure 6, the zone that the forward direction beam interference is little (being the forward direction quiescent region), the antenna patch is responsible for receiving upward signal.
Illustrate: provided two kinds of different embodiments here, example one is to realize System Expansion by the method for coordinating forward wave beam power between the adjacent base station; Example two is the method realization System Expansion that form direction by control planning forward direction wave beam.Can prove some specific algorithms of hiding that also have other, realize System Expansion such as method in conjunction with control forward direction beam direction and power.What the present invention mainly proposed is that the method that the forward direction wave beam is hidden reduces inter-signal interference, and system is carried out dilatation, and further improves the availability of frequency spectrum and power system capacity by the technology that increases the antenna patch.
Claims (8)
1. a communication system volume expansion method the steps include:
1) adjacent with it base station relative position information is determined in each base station;
2) positional information and the channel quality information of mobile terminal in this sub-district determined in the base station by the upward signal that receives;
3) the forward direction wave beam between next descending time slot neighbor cell is coordinated, the interference of hiding neighbor cell forward wave interfascicular according to adjacent base station relative position information, the positional information and the channel quality information of mobile terminal in each base station;
4) beam shaping is launched the forward direction wave beam after coordinating as downstream signal.
2. the method for claim 1 is characterized in that described base station connects one or more antenna patches, is used to receive the upward signal of mobile terminal in the sub-district.
3. method as claimed in claim 2, the method of work that it is characterized in that described antenna patch is: whether the suffered signal interference value of antenna patch detection itself greater than the interference threshold of setting, if suffered signal interference value is greater than the interference threshold of setting then ignore the upward signal that receives; If suffered signal interference value is less than the interference threshold of setting then the upward signal that receives is sent to the base station.
4. the method for claim 1, it is characterized in that including but not limited to that following one or more methods coordinate the forward direction wave beam between next descending time slot neighbor cell, the interference of hiding neighbor cell forward wave interfascicular: coordinate the forward direction wave beam between next descending time slot neighbor cell transmitting power, coordinate the transmit direction of the forward direction wave beam between next descending time slot neighbor cell.
5. method as claimed in claim 4 is characterized in that described transmitting power by the forward direction wave beam between next descending time slot neighbor cell of coordination, and the method for hiding the interference of neighbor cell forward wave interfascicular is:
1) base station is according to described adjacent base station relative position information, the positional information of mobile terminal and the direction that channel quality information is determined next this cell forward of descending time slot wave beam;
2) judge in this sub-district the forward direction wave beam whether with neighbor cell in forward direction beam position the same area, if there is the forward direction wave beam that points to the same area, then dwindle the transmitting power of this forward direction wave beam in this sub-district or the neighbor cell, control forward wave beam diameter is to coverage;
3) alternately adjust the size of two forward wave beam diameters in the same zone of sensing according to descending time slot between the adjacent base station to coverage.
6. method as claimed in claim 4 is characterized in that described transmit direction by the forward direction wave beam between next descending time slot neighbor cell of coordination, and the method for hiding the interference of neighbor cell forward wave interfascicular is:
1) each microzonation is divided into several sectors; The opening direction correspondence of described sector in each sub-district is identical;
2) will be positioned at the forward direction wave beam of same sector in each sub-district as the armed forward direction wave beam of same time slot;
3) the forward direction wave beam in the identical sector of an opening direction is launched in each sub-district in same descending time slot;
4) forward direction beam transmission sector, the whole sub-district of searching loop are rotated according to descending time slot in each sub-district.
7. method as claimed in claim 6 is characterized in that each sub-district receives the mobile terminal upward signal at ascending time slot, upgrades the positional information and the channel quality information of mobile terminal in each sector, thereby upgrades armed forward direction wave beam in each sector.
8. as claim 1 or 5 described methods, it is characterized in that by the cable between the base station, optical cable or when the base station is set the positional information between the base station determine described adjacent base station relative position information.
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| CN2008102276792A CN101754477B (en) | 2008-11-28 | 2008-11-28 | Communication system volume expansion method |
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| CN2008102276792A CN101754477B (en) | 2008-11-28 | 2008-11-28 | Communication system volume expansion method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102271414A (en) * | 2011-08-05 | 2011-12-07 | 电信科学技术研究院 | Method for transmission scheduling and device thereof |
| CN102547896A (en) * | 2010-11-19 | 2012-07-04 | 株式会社日立制作所 | Wireless communication system and method for wireless communication |
| CN102612156A (en) * | 2012-01-18 | 2012-07-25 | 北京大学 | Duplex communication method based on time domain scheduling |
| WO2013034109A1 (en) * | 2011-09-08 | 2013-03-14 | 华为技术有限公司 | Aas-based method, system, ue, and base station for information exchange |
| WO2016054819A1 (en) * | 2014-10-11 | 2016-04-14 | 华为技术有限公司 | Method and device for transmitting signals, and system |
| CN106507479A (en) * | 2016-11-28 | 2017-03-15 | 成都理想境界科技有限公司 | A kind of method of base station network, alignment system and building topology structure |
| CN108242951A (en) * | 2016-12-27 | 2018-07-03 | 华为技术有限公司 | For the methods, devices and systems of High Altitude Platform radio station cooperation covering |
| CN111436053A (en) * | 2019-02-28 | 2020-07-21 | 维沃移动通信有限公司 | Coverage area adjusting method and wireless access network node |
| CN112073354A (en) * | 2020-09-09 | 2020-12-11 | 浙江树人学院（浙江树人大学） | High-speed mobile wireless communication system based on FPGA |
| CN113727365A (en) * | 2021-08-27 | 2021-11-30 | 中国联合网络通信集团有限公司 | Interference control method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| FI20000476A0 (en) * | 2000-03-01 | 2000-03-01 | Nokia Networks Oy | A method for improving radio communication performance |
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- 2008-11-28 CN CN2008102276792A patent/CN101754477B/en not_active Expired - Fee Related
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| CN102547896A (en) * | 2010-11-19 | 2012-07-04 | 株式会社日立制作所 | Wireless communication system and method for wireless communication |
| CN102547896B (en) * | 2010-11-19 | 2015-06-03 | 株式会社日立制作所 | Wireless communication system and method for wireless communication |
| CN102271414A (en) * | 2011-08-05 | 2011-12-07 | 电信科学技术研究院 | Method for transmission scheduling and device thereof |
| WO2013020458A1 (en) * | 2011-08-05 | 2013-02-14 | 电信科学技术研究院 | Transmission scheduling method and device |
| CN102271414B (en) * | 2011-08-05 | 2013-08-14 | 电信科学技术研究院 | Method for transmission scheduling and device thereof |
| WO2013034109A1 (en) * | 2011-09-08 | 2013-03-14 | 华为技术有限公司 | Aas-based method, system, ue, and base station for information exchange |
| CN102612156A (en) * | 2012-01-18 | 2012-07-25 | 北京大学 | Duplex communication method based on time domain scheduling |
| CN105900493A (en) * | 2014-10-11 | 2016-08-24 | 华为技术有限公司 | Method and device for transmitting signals, and system |
| WO2016054819A1 (en) * | 2014-10-11 | 2016-04-14 | 华为技术有限公司 | Method and device for transmitting signals, and system |
| CN105900493B (en) * | 2014-10-11 | 2020-02-14 | 华为技术有限公司 | Method, device and system for transmitting signal |
| CN106507479A (en) * | 2016-11-28 | 2017-03-15 | 成都理想境界科技有限公司 | A kind of method of base station network, alignment system and building topology structure |
| CN108242951A (en) * | 2016-12-27 | 2018-07-03 | 华为技术有限公司 | For the methods, devices and systems of High Altitude Platform radio station cooperation covering |
| CN111436053A (en) * | 2019-02-28 | 2020-07-21 | 维沃移动通信有限公司 | Coverage area adjusting method and wireless access network node |
| WO2020173327A1 (en) * | 2019-02-28 | 2020-09-03 | 维沃移动通信有限公司 | Coverage adjustment method and wireless access network node |
| CN111436053B (en) * | 2019-02-28 | 2022-07-08 | 维沃移动通信有限公司 | Coverage area adjusting method and wireless access network node |
| CN112073354A (en) * | 2020-09-09 | 2020-12-11 | 浙江树人学院（浙江树人大学） | High-speed mobile wireless communication system based on FPGA |
| CN112073354B (en) * | 2020-09-09 | 2023-06-06 | 浙江树人学院（浙江树人大学） | High-speed mobile wireless communication system based on FPGA |
| CN113727365A (en) * | 2021-08-27 | 2021-11-30 | 中国联合网络通信集团有限公司 | Interference control method and device |
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| CN101754477B (en) | 2012-06-20 |
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