CN101707795B - Method for eliminating interference between self-organized network base station nodes - Google Patents
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Abstract
The invention relates to the field of mobile communication, in particular to a method for eliminating interference between self-organized network base station nodes. Each base station node detects the signal intensity of an adjacent base station node and broadcasts the signal intensity in system message, and the adjacent base station node acquires own interference degree to the base station node from the monitored system message so as to adjust own transmitting power to achieve the aim of reducing mutual interference between the base station nodes. The method does not need to establish a special physical channel between the adjacent base station nodes, and does not need to change a self-organized network architecture much, thereby simplifying the complexity of the self-organized network design and saving wireless resources of air interfaces at the same time.
Description
Invention field
The present invention relates to moving communicating field, particularly the interference elimination method between the self-organized network base station node.
Background technology
In the development process of mobile communication, two kinds of networking modes have appearred, and a kind of is the fixed base stations networking mode, and this mode number of applications moves GSM (abbreviation: GSM) with in the 3G (Third Generation) Moblie network (be called for short: 3G) to the second generation.Its characteristics need have been carried out careful base station selection in the early stage of arranging net of mobile communication, and wireless signal coverage planning and wireless signal interference analysis help the raising of the wireless performance of whole system; But the maximum drawback of this mode is that the networking cycle is long; The networking process is complicated, and after the selected address, base station, change site that can not be random; Obvious this networking mode can not satisfy the demand of urgency communication; In great geological disaster, seem powerless in face of the urgent natural calamity of for example earthquake, tsunami or the like, carry out networking so in the communications field, proposed the ad-hoc network mode.
Ad-hoc network need not carry out wireless environment analysis in advance in the networking process; Each base-station node in the ad-hoc network can form an organic communication network through self radio search adjacent base station nodal information or the fixing configuration of user oneself, and uses relaying technique to come the wireless performance at reinforced cell edge.This networking mode is well used at the Home eNodeB of present 3-G (Generation Three mobile communication system), in following the 4th third-generation mobile communication (being called for short LTE+Advanced) also with widespread adoption.
But owing to do not have unified planning between the ad-hoc network different base stations node HNB; Distance is difficult to fixing between the base-station node; The geographical environment that uses also is difficult to assessment; There is very big randomness, is difficult to confirm the signal transmission power of base-station node, cause being difficult to eliminate the phase mutual interference between the base-station node.
Provide also the simplest ad-hoc network framework of typical case among Fig. 1, whole network is made up of three base-station node A, B, C.Can obviously draw from Fig. 1, the signal that base-station node B sends can directly arrive base-station node A and C, the system message that base-station node B is broadcasted, and base-station node A and C can both listen to normally.Base-station node B transmits and must cause certain interference to base node A and C node.In most ad-hoc network system, there is not direct Signalling exchange between each base-station node.Base-station node B can only measure the intensity that transmits from base-station node A and C.But base-station node B is not sure of the signal strength signal intensity that oneself transmits and receive at other base-station nodes.
At present; In the application system of reality, carry out information exchange between two adjacent base station nodes, way is between each base-station node, to use special-purpose physical channel usually; Because each base-station node needs and all adjacent base station nodes carry out after the information interaction; Could reduce the interference to other adjacent base station nodes to the transmitting power adjustment of this base-station node, if the base stations neighboring node device has n, the channel between the adjacent base station reaches n (n+1)/2 so; Cause the signaling control between the base-station node complicated, waste a large amount of air interface Radio Resources.
Summary of the invention
Use special-purpose physical channel between interference and the base-station node for solving to exist between each node of present ad-hoc network; Signaling control is complicated; Waste the problem of a large amount of air interface Radio Resources, the present invention proposes the interference elimination method between a kind of self-organized network base station node, and this method mainly is applicable in the ad-hoc network that has broadcast system message; Each base-station node detects the signal strength signal intensity of its adjacent base station node and in system message, broadcasts; The adjacent base station node obtains own annoyance level to the adjacent base station node from the system message that listens to, thus the transmitting power of adjustment oneself, to reach the purpose that reduces phase mutual interference between the base-station node.
Interference elimination method between a kind of self-organized network base station node of the present invention is characterized in that, may further comprise the steps:
Steps A: near the pilot signal strength of this base-station node all adjacent base station nodes keeping watch on, measure the signal strength signal intensity that all adjacent base station nodes arrive this base-station node respectively;
Step B: in the system message of this base-station node, increase the information unit IE of other HNB situation, and in the system information of this base-station node, broadcast;
Said information unit comprises that adjacent base station node identification, adjacent base station node arrive the signal strength signal intensity of this base-station node;
Step C: adjacent base station node monitoring system information identifies the signal strength signal intensity of from system message, obtaining its its adjacent base station node of arrival that transmits according to base-station node; And detect the signal strength signal intensity that its adjacent base station node arrives this base-station node;
Step D: listen to the base station of system information, node is adjusted its transmitting power according to own transmit signal strength, and the signal strength signal intensity that detected its adjacent base station node arrives this base-station node is broadcasted in system message;
Step e: this base-station node is listened to the system message of its adjacent base station node broadcasts, and from system message, obtain this base-station node and transmit and arrive the signal strength signal intensity of its adjacent base station node, and according to the transmitting power of obtaining this base-station node of signal strength signal intensity adjustment.
The present invention is with respect to carrying out information switching method between the existing adjacent base station node; Its technical advantage is: the system message broadcasting characteristics that made full use of base-station node; Need between the adjacent base station node, not set up special-purpose physical path; Need not do big variation, simplify the complexity of MANET road design, save the Radio Resource of air interface simultaneously yet the ad-hoc network framework.
Description of drawings
Fig. 1 is an information interaction graph of a relation between each base-station node of ad-hoc network
Fig. 2 is an interference elimination method flow chart between the node of ad-hoc network of the present invention
Fig. 3 is the process chart that HNB carries out the transmitted power adjustment among the present invention
Embodiment
In order to make the object of the invention, technical scheme and technical advantage clearer,, the interference elimination method between a kind of self-organized network base station node of the present invention is done further explain below in conjunction with accompanying drawing and embodiment.
To illustrate the concrete use in Home eNodeB in the present invention.Like Fig. 1, suppose that base-station node A and the C among the figure opens, establish a base-station node B newly at present.Step is following:
First: open base-station node B; Near the HNB pilot signal strength of Node B all other keeping watch on if be necessary, can further be kept watch near the RST of macro base stations all it; Measure the signal strength signal intensity that other HNB or macro base station arrive base-station node B, be designated as RSCPn;
The method of measurement of said signal strength signal intensity RSCPn can adopt this area convectional signals ionization meter means;
Second: near the information unit IE of macro base station or other HNB situation increase is correlated with in the system message of base-station node B, broadcast in system information;
The signal strength signal intensity RSCPn of each the adjacent HNB that comprised the adjacent base station node identification among the said information unit IE, searches, the corresponding cover IE parameter of each adjacent HNB or macro base station;
The 3rd: adjacent HNB will monitor the system message of its all HNB near; Present embodiment is an example with base-station node A, and base-station node A listens to the system message of base-station node B broadcasting, and according to the base-station node identification information, base-station node A obtains and oneself sends the signal strength signal intensity of signal at base-station node B place;
The 4th: adjacent HNB adjusts the transmitted power of oneself according to the content that receives system message; Measure the signal strength signal intensity that its adjacent base station node arrives this base-station node, and in system message, broadcast;
The method that said adjacent HNB (following table is shown this HNB) adjusts transmitting power is following, flow process as shown in Figure 3:
(1) near its macro base station or other HNB node of this HNB search; Monitor the system message of its adjacent macro base station and other HNB; And separate and read the system message content, therefrom obtain this HNB send channel, be recorded as RSCPn in the signal strength signal intensity that other adjacent macro base stations and HNB receive.
(2) if the value of RSCPn, thinks then that this HNB has caused intolerable interference to this base station greater than MaxRSCPn, then need reduce the transmitting power of a grade of this HNB.Wherein, MaxRSCPn representes the maximum interference tolerance amount that system can bear, usually value-60db.
(3) if the value of RSCPn less than MaxRSCPn, then this HNB continues then to judge that whether interference RSCPn that this HNB causes other macro base stations or other HNB is greater than MaxRSCPn-offset.If it is very little that this HNB disturbs other macro base stations or other HNB, promptly satisfy RSCPn＜MaxRSCPn-offset and do not reach own maximum transmission power, then this HNB can increase the transmitting power of a grade, otherwise, do not do transmitting power adjustment.Wherein, offset representes the affluence amount disturbed between two base stations, usually value 10db.
The 5th: base-station node B listens to the system message of its adjacent base station node broadcasts, and from system message, obtain base-station node and transmit and arrive the signal strength signal intensity of its adjacent base station node, and according to the transmitting power of obtaining this base-station node of signal strength signal intensity adjustment;
The above broadcasting can be taked the periodic broadcast or the mode of continuous broadcast according to the demand of reality.
It will be apparent to those skilled in the art that and understand that the above embodiment that system and method for the present invention is lifted only is used to explain the present invention, and is not limited to the present invention.Though effectively described the present invention through embodiment; Those skilled in the art will know that; There are many variations in the present invention; Under the situation that does not deviate from spirit of the present invention and essence thereof, those skilled in the art work as can make various corresponding changes or distortion according to the inventive method, but these corresponding changes or distortion all belong to claim protection range of the present invention.
Claims (4)
1. the interference elimination method between the self-organized network base station node is characterized in that, may further comprise the steps:
Steps A: this base-station node is kept watch near the pilot signal strength of the adjacent base station node all, measures the signal strength signal intensity that all adjacent base station nodes arrive this base-station node respectively;
Step B: in the system message of this base-station node, increase the information unit IE of other base-station nodes HNB situation, and in the system information of this base-station node, broadcast;
Said information unit comprises that adjacent base station node identification and adjacent base station node arrive the signal strength signal intensity of this base-station node;
Step C: adjacent base station node monitoring system information, from system message, obtain its signal strength signal intensity according to the base-station node sign to its its adjacent base station node of arrival that transmits of adjacent base station node; And measure the signal strength signal intensity that its adjacent base station node arrives this base-station node;
Step D: listen to the base-station node of system information,, adjust its transmitting power, and the signal strength signal intensity that detected its adjacent base station node arrives this base-station node is broadcasted in system message according to own transmit signal strength;
Step e: this base-station node is listened to the system message of adjacent base station node broadcasts; From system message, obtain its signal strength signal intensity to its adjacent base station node of arrival that transmits of adjacent base station node, and according to the transmitting power of obtaining this base-station node of signal strength signal intensity adjustment.
2. the interference elimination method between the self-organized network base station node as claimed in claim 1 is characterized in that, near the adjacent base station node keeping watch on all, and near all macro base stations also can further keeping watch on.
3. the interference elimination method between the self-organized network base station node as claimed in claim 1 is characterized in that, said broadcasting can be taked the periodic broadcast or the mode of continuous broadcast according to the demand of reality.
4. the interference elimination method between the self-organized network base station node as claimed in claim 2 is characterized in that, the said method that listens to the base-station node adjustment transmitting power of system information further may further comprise the steps:
(1) near its macro base station or other HNB node of this HNB search; Monitor the system message of its adjacent macro base station and other HNB; And separate and read the system message content, therefrom obtain the signal strength signal intensity that this HNB transmits and receives at other adjacent macro base stations and HNB, be recorded as RSCPn;
(2) if the value of RSCPn, thinks then that this HNB has caused intolerable interference to this base station greater than MaxRSCPn, then need reduce the transmitting power of a grade of this HNB; Wherein, MaxRSCPn representes the maximum interference tolerance amount that system can bear, usually value-60db;
(3) if the value of RSCPn less than MaxRSCPn, then this HNB continues then to judge that whether signal strength signal intensity RSCPn that this HNB receives at other macro base stations or other HNB is greater than MaxRSCPn-offset; If it is very little that this HNB disturbs other macro base stations or other HNB, promptly satisfy RSCPn＜MaxRSCPn-offset and do not reach own maximum transmission power, then this HNB increases the transmitting power of a grade, otherwise, do not do transmitting power adjustment; Wherein, offset representes the affluence amount disturbed between two base stations, usually value 10db;
Said HNB is the base-station node that listens to system information.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB2480692B (en) | 2010-05-28 | 2013-06-12 | Toshiba Res Europ Ltd | Radio resource management in femtocells |
| GB2480691B (en) * | 2010-05-28 | 2012-10-03 | Toshiba Res Europ Ltd | Radio resource management in femtocells |
| CN102281617B (en) * | 2010-06-11 | 2014-12-31 | 联芯科技有限公司 | E-TFC (E-PUCH Transport Format Combination) selection method and device for TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) multi-carrier HSUPA (High Speed Uplink Packet Access) system |
| CN102547722B (en) * | 2010-12-09 | 2014-12-31 | 中兴通讯股份有限公司 | Method, base station and system for automatically selecting frequency spectrums |
| CN102740436B (en) * | 2011-04-07 | 2014-12-31 | 华为技术有限公司 | Power adjusting method and base station |
| CN103702091B (en) * | 2014-01-07 | 2017-01-04 | 北京蛙视通信技术股份有限公司 | A kind of network-building method of wireless portable video monitoring system |
| CN106576317B (en) | 2015-07-29 | 2020-06-16 | 华为技术有限公司 | Small base station and communication control method thereof |
| WO2018000199A1 (en) * | 2016-06-28 | 2018-01-04 | 华为技术有限公司 | Method and apparatus for coordinating cell interference |
| CN106789273A (en) * | 2016-12-27 | 2017-05-31 | 上海斐讯数据通信技术有限公司 | A kind of router automatically configures network-building method and system |
| CN110830131A (en) * | 2018-08-10 | 2020-02-21 | ***通信有限公司研究院 | Information sending method, information receiving method, device and base station |
| CN110831043B (en) * | 2018-08-10 | 2022-09-27 | 维沃移动通信有限公司 | Interference processing method, device and system |
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| CN101189858A (en) * | 2005-02-25 | 2008-05-28 | 思科技术公司 | Location-based enhancements for wireless intrusion detection |
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