CN101369831B - Restraint method and system for interference between cells - Google Patents
Restraint method and system for interference between cells Download PDFInfo
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- CN101369831B CN101369831B CN2007101387543A CN200710138754A CN101369831B CN 101369831 B CN101369831 B CN 101369831B CN 2007101387543 A CN2007101387543 A CN 2007101387543A CN 200710138754 A CN200710138754 A CN 200710138754A CN 101369831 B CN101369831 B CN 101369831B
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Abstract
The invention discloses an inhibition method and system of an inter-cell interference comprising the following steps: (1) a base station detects the disturbance intensity from other cell mobile terminal on the self-cell up link and sends an disturbance intensity indication message which carries the disturbance intensity; (2) a mobile terminal receives a disturbance intensity indication message sent by other cell base station and controls and regulates the usable up transmission power value of the mobile terminal according to the disturbance intensity indicated by the disturbance intensity indication message; the mobile terminal reports the up transmission power value to a service base station. The system includes a base station and a mobile terminal, the base station also includes an interference detection module, and the mobile terminal also includes a power control module. The inter-cell interference is inhibited by using the method and system of the invention and the dynamic balance of the cell up link quality is achieved.
Description
Technical field
The present invention relates to the wireless mobile communications field, relate in particular to a kind of inter-cell interference suppression method and system.
Background technology
In the mobile radio system; The base station is to show the equipment that portable terminal provides service; Each base station can be limited to the give security zone of data transmission quality of portable terminal; If portable terminal moves at present and to it serving base station cell covered edge is provided, for keep and the base station between proper communication, portable terminal possibly need increase up-link transmission power; Thereby the up link to the adjacent base station cell covered causes interference, influences the communication quality of adjacent base station up link.It may be noted that the descending base station that is meant arrives the portable terminal direction here, up be meant portable terminal to the base station direction.
In order to address the above problem; Mobile radio system is employed in usually that the different frequency range of employing reduces the interference of up link each other between the neighbor cell; But wasted the frequency spectrum resource of a large amount of preciousnesses like this; And the minizone time delay for switching also can be very big, and this is unacceptable to the relatively more responsive business of time delay.
Summary of the invention
The technical problem that the present invention will solve provides a kind of inter-cell interference suppression method and system, suppresses the interference of minizone, reaches the dynamic equilibrium of cell uplink quality.
In order to address the above problem, the invention provides a kind of inter-cell interference suppression method, may further comprise the steps:
(1) on this cell uplink of base station measurement from the interference strength of the portable terminal of other sub-district, and send the interference strength Indication message; Said interference strength Indication message carries interference strength;
(2) portable terminal receives the interference strength Indication message that other cell base station sends, and adjusts the available uplink transmission power value of portable terminal according to the interference strength control of said interference strength Indication message indication; Portable terminal reports to serving BS with said uplink transmission power value.
Inter-cell interference suppression method of the present invention wherein, in step (2), preestablishes interference strength threshold value T and interference strength adjusted value m; Portable terminal is selected maximum interference strength Rmax from the interference strength that the interference strength Indication message that is received is indicated; And it is Rmax and T is relatively big or small; When Rmax＜T, do not adjust current uplink transmission power Pt, portable terminal adopts power P t to send upstream data to the serving BS report; Otherwise uplink transmission power is adjusted into Pt-m, and portable terminal adopts power P t-m to send upstream data to the serving BS report.
Inter-cell interference suppression method of the present invention, wherein, said interference strength threshold value is a plurality of, and for each interference strength threshold value the interference strength adjusted value is set.
Inter-cell interference suppression method of the present invention; Wherein, In step (1), said base station is sent interference strength Indication message step and comprised: the base station is sent the interference strength Indication message according to coverage through coded system, and said coded system is for increasing the channel coding method of redundant information.
The present invention also provides a kind of inter-cell interference suppression system, comprises base station and portable terminal, and said base station also comprises interference measurement module, and said portable terminal also comprises power control module, wherein:
Interference measurement module is used for the interference strength of the portable terminal of other sub-district of measure and transmit to this cell uplink;
Power control module is used for according to the available uplink transmission power value of adjusting said portable terminal from the interference strength control of other cell mobile terminal.
Inter-cell interference suppression of the present invention system, wherein, said base station also comprises the base station coding/decoding module, said portable terminal also comprises the terminal coding/decoding module, wherein:
The base station coding/decoding module; Link to each other with interference measurement module; Other cell mobile terminal that is used for interference measurement module is measured is encoded to the interference strength value of the up link of this sub-district, obtains carrying the interference strength Indication message of interference strength and it is passed to base station radio frequency module;
The terminal coding/decoding module links to each other with power control module, and after the interference strength Indication message that is used for that the terminal radio frequency module is sent carried out decoding processing, the interference strength that said interference strength Indication message is carried sent to power control module.
Inter-cell interference suppression of the present invention system, wherein, said base station coding/decoding module comprises redundancy encoding module, modulation module and scrambling module, wherein:
The redundancy encoding module is used to receive the interference strength from interference measurement module, increases the redundant information of said interference strength;
Modulation module, the interference strength Indication message that the signal transition that is used for that the redundancy encoding module is exported becomes to be adapted at transmitting on the wireless channel, said interference strength Indication message carries interference strength;
Scrambling module is used to receive from the interference strength Indication message of modulation module and overcomes the influence of presence of intercell interference to the said interference strength Indication message of successfully decoding.
Inter-cell interference suppression of the present invention system; Wherein, said power control module comprises according to the available uplink transmission power value step of the interference strength measurement result control adjustment portable terminal that comes self terminal: preestablish interference strength threshold value T and interference strength adjusted value m; From the interference strength measurement result that is received, select maximum interference strength Rmax, and Rmax and T is relatively big or small, when Rmax＜T, do not adjust current uplink transmission power Pt; Otherwise uplink transmission power is adjusted into Pt-m.
Inter-cell interference suppression of the present invention system, wherein, said interference strength threshold value is a plurality of, and for each interference strength threshold value the interference strength adjusted value is set.
Adopt method and system of the present invention, compared with prior art, suppress the interference of minizone, reach the dynamic equilibrium of cell uplink quality.
Description of drawings
Fig. 1 is a kind of practical implementation operational flowchart of the method for the invention;
Fig. 2 is the another kind of practical implementation operational flowchart of the method for the invention;
Fig. 3 is the structure chart of the base station of a kind of practical implementation of system according to the invention;
Fig. 4 is the structure chart of the portable terminal of a kind of practical implementation of system according to the invention;
Fig. 5 is the structure chart of the base station coding/decoding module that adopts of the base station of the another kind of practical implementation of system according to the invention.
Embodiment
The present invention further sets forth a kind of inter-cell interference suppression method and system of the present invention in order to solve the drawback that conventional solution exists through following examples, below embodiment is described in detail, but not as to qualification of the present invention.
As shown in Figure 1, a kind of practical implementation operational flowchart of the method for the invention.A kind of practical implementation of the method for the invention may further comprise the steps:
Step 11 from the interference strength of the portable terminal of other sub-district, and is sent the interference strength Indication message on this cell uplink of base station measurement; Said interference strength Indication message carries interference strength;
The interference strength Indication message can be sent through coded system according to coverage in the base station, and said coded system is for increasing the channel coding method of redundant information.
Step 12; Portable terminal in a certain sub-district receives the interference strength indication information that other cell base station sends; And the interference strength that said interference strength Indication message is carried controls its available uplink transmission power value of adjustment as an input item of said portable terminal uplink power control, and portable terminal reports serving BS with said uplink transmission power value.
IEEE (Institute of Electrical and Electronics Engineers; IEEE) the 802.16th, a kind of broadband wireless MAN technology; Be intended to for fixed broadband wireless access system provides efficient, as to be suitable for and to have good interoperability performance access means, its agreement is mainly paid close attention to the air interface content.
As shown in Figure 2, the another kind of practical implementation operational flowchart of the method for the invention.The another kind of practical implementation of the method for the invention is concrete an application in the wireless communication system that adopts IEEE 802.16 standards, supposes that portable terminal has carried out the part flow process of power control before, obtains adjusted performance number Pt.The another kind of practical implementation of the method for the invention may further comprise the steps:
Step 23 preestablishes interference strength threshold value T and interference strength adjusted value m; Portable terminal is the size between Rmax and the T relatively, if Rmax＜T (this value choose the concrete wireless network planning situation that depends on) goes to step 24; Otherwise go to step 25;
Put＝Pt-m (1)
In the formula (1), m chooses the concrete wireless network planning situation that depends on, and generally this is worth and is 1dB.
In step 23 and step 24, portable terminal also can realize that meticulousr presence of intercell interference suppresses, and correspondingly, also is provided with corresponding interference strength adjusted value for each interference strength threshold value according to a plurality of interference strength threshold values of the requirement definition of operator.
For example, portable terminal has defined two interference strength threshold value T1 and T2, and for T1 and T2 set corresponding interference strength adjusted value m1 and m2, wherein, T1＜T2, then portable terminal comparison Rmax and T1, T2; When Rmax＜T1, do not adjust current uplink transmission power Pt; When T1＜Rmax＜T2, uplink transmission power is adjusted into Pt-m1; When Rmax＞T2, uplink transmission power is adjusted into Pt-m2.
A kind of practical implementation of system according to the invention comprises base station and portable terminal, wherein,
As shown in Figure 3, the base station comprises interference measurement module 31, base station coding/decoding module 32 and base station radio frequency module 33, wherein:
Base station coding/decoding module 32; Link to each other with interference measurement module 31; Other cell mobile terminal that is used for interference measurement module 31 is measured is encoded to the interference strength value of the up link of this sub-district, obtains carrying the interference strength Indication message of interference strength and it is passed to base station radio frequency module 33;
Base station radio frequency module 33 is used for said interference strength Indication message is emitted to terminal radio frequency module 41;
As shown in Figure 4, portable terminal comprises terminal radio frequency module 41, terminal coding/decoding module 42 and power control module 43, wherein:
Terminal radio frequency module 41 is used to receive from the interference strength Indication message of base station radio frequency module 33 and is sent to terminal coding/decoding module 42;
Terminal coding/decoding module 42 links to each other with power control module 43, and after the interference strength Indication message that terminal radio frequency module 41 is sent carried out decoding processing, the interference strength that said interference strength Indication message is carried sent to power control module 43;
Power control module 43 is used for according to the available uplink transmission power value of adjusting said portable terminal from the interference strength control of other cell mobile terminal.
In said power control module 43, preestablish interference strength threshold value T and interference strength adjusted value m; From the interference strength measurement result that is received, select maximum interference strength Rmax, and Rmax and T is relatively big or small, when Rmax＜T, do not adjust current uplink transmission power Pt; Otherwise uplink transmission power is adjusted into Pt-m.
Said interference strength threshold value can be for a plurality of, and for each interference strength threshold value the interference strength adjusted value are set.
According to a kind of preferred implementation, as shown in Figure 5, said base station coding/decoding module 32 comprises redundancy encoding module 51, modulation module 52 and scrambling module 53, wherein:
Increase the redundant information of said interference strength, can overcome big wireless channel decline;
Scrambling module 53 is used to receive from the interference strength Indication message of modulation module 52 and overcomes the influence of presence of intercell interference to the said interference strength Indication message of successfully decoding.
After the interference strength indication information that adopts this mode to encode is received by the coding/decoding module at terminal; Owing to utilize redundancy encoding and signal scrambling technique; Can overcome the influence of wireless channel decline and presence of intercell interference effectively, improve the reliability of interference strength indication information decoding terminals interference strength Indication message.
Presence of intercell interference intensity level after the quantification generates the modulation symbol of interference strength size between indicating cells through redundancy encoding module 51, modulation module 52, scrambling module 53, and this modulation symbol can use proprietary forward channel or form of message to broadcast to portable terminal after through reprocessing.
In the described method and system of the embodiment of the invention; Base station measurement transmits to the interference strength of this cell uplink from the portable terminal of other sub-district; And inform the portable terminal of other sub-district; The portable terminal of other sub-district obtains to pass through the size of its available uplink transmission power of adjustment after this information, thereby suppresses the interference of minizone, reaches the dynamic equilibrium of inter-cell uplink link-quality.
Certainly; The present invention also can have other various embodiments; Under the situation that does not deviate from spirit of the present invention and essence thereof; Those of ordinary skill in the art can make various corresponding changes and modification according to the present invention, but these corresponding changes and modification all should belong to the protection range of the appended claim of the present invention.
Claims (9)
1. an inter-cell interference suppression method is characterized in that, may further comprise the steps:
(1) on this cell uplink of base station measurement from the interference strength of the portable terminal of other sub-district, and send the interference strength Indication message; Said interference strength Indication message carries interference strength;
(2) portable terminal receives the interference strength Indication message that other cell base station sends, and adjusts the available uplink transmission power value of portable terminal according to the interference strength control of said interference strength Indication message indication; Portable terminal reports to serving BS with said uplink transmission power value.
2. method according to claim 1 is characterized in that, in step (2), preestablishes interference strength threshold value T and interference strength adjusted value m; Portable terminal is selected maximum interference strength Rmax from the interference strength that the interference strength Indication message that is received is indicated; And it is Rmax and T is relatively big or small; When Rmax＜T, do not adjust current uplink transmission power Pt, portable terminal adopts power P t to send upstream data to the serving BS report; Otherwise uplink transmission power is adjusted into Pt-m, and portable terminal adopts power P t-m to send upstream data to the serving BS report.
3. method according to claim 2 is characterized in that, said interference strength threshold value is a plurality of, and for each interference strength threshold value the interference strength adjusted value is set.
4. method according to claim 1; It is characterized in that; In step (1), said base station is sent interference strength Indication message step and comprised: the base station is sent the interference strength Indication message according to coverage through coded system, and said coded system is for increasing the channel coding method of redundant information.
5. an inter-cell interference suppression system comprises base station and portable terminal, it is characterized in that, said base station also comprises interference measurement module, and said portable terminal also comprises power control module, wherein:
Interference measurement module is used for the interference strength of the portable terminal of other sub-district of measure and transmit to this cell uplink;
Power control module is used for according to the available uplink transmission power value of adjusting said portable terminal from the interference strength control of other cell mobile terminal.
6. system according to claim 5 is characterized in that said base station also comprises the base station coding/decoding module, and said portable terminal also comprises the terminal coding/decoding module, wherein:
The base station coding/decoding module; Link to each other with interference measurement module; Other cell mobile terminal that is used for interference measurement module is measured is encoded to the interference strength value of the up link of this sub-district, obtains carrying the interference strength Indication message of interference strength and it is passed to base station radio frequency module;
The terminal coding/decoding module links to each other with power control module, and after the interference strength Indication message that is used for that the terminal radio frequency module is sent carried out decoding processing, the interference strength that said interference strength Indication message is carried sent to power control module.
7. system according to claim 6 is characterized in that, said base station coding/decoding module comprises redundancy encoding module, modulation module and scrambling module, wherein:
The redundancy encoding module is used to receive the interference strength from interference measurement module, increases the redundant information of said interference strength;
Modulation module, the interference strength Indication message that the signal transition that is used for that the redundancy encoding module is exported becomes to be adapted at transmitting on the wireless channel, said interference strength Indication message carries interference strength;
Scrambling module is used to receive from the interference strength Indication message of modulation module and overcomes the influence of presence of intercell interference to the said interference strength Indication message of successfully decoding.
8. system according to claim 5; It is characterized in that said power control module comprises according to the available uplink transmission power value step of the interference strength measurement result control adjustment portable terminal that comes self terminal: preestablish interference strength threshold value T and interference strength adjusted value m; From the interference strength measurement result that is received, select maximum interference strength Rmax, and Rmax and T is relatively big or small, when Rmax＜T, do not adjust current uplink transmission power Pt; Otherwise uplink transmission power is adjusted into Pt-m.
9. system according to claim 8 is characterized in that, said interference strength threshold value is a plurality of, and for each interference strength threshold value the interference strength adjusted value is set.
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| CN2007101387543A CN101369831B (en) | 2007-08-16 | 2007-08-16 | Restraint method and system for interference between cells |
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| CN2007101387543A CN101369831B (en) | 2007-08-16 | 2007-08-16 | Restraint method and system for interference between cells |
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| CN101369831A CN101369831A (en) | 2009-02-18 |
| CN101369831B true CN101369831B (en) | 2012-05-23 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101820683A (en) * | 2009-02-26 | 2010-09-01 | 中兴通讯股份有限公司 | Method for transmitting interference control information |
| CN101854635B (en) * | 2009-04-03 | 2015-08-12 | 中兴通讯股份有限公司 | The sending method of inter cell interference coordination indication information and device |
| CN101945465B (en) * | 2009-07-03 | 2015-01-28 | 中兴通讯股份有限公司 | Method for sending and receiving interference control function indication signaling and terminal |
| WO2011113192A1 (en) * | 2010-03-15 | 2011-09-22 | 上海贝尔股份有限公司 | Distributed resource allocation method and device for reducing intercell downlink interference |
| WO2011130914A1 (en) * | 2010-04-23 | 2011-10-27 | Huawei Technologies Co., Ltd. | Method for controlling inter-cell interference in cellular communication arrangement |
| CN102833793B (en) | 2011-06-17 | 2016-06-08 | 华为技术有限公司 | Disturbance coordination method and base station |
| CN105792373B (en) * | 2014-12-24 | 2020-11-06 | 电信科学技术研究院 | Interference information indication method, interference suppression method and device |
| CN106209301A (en) * | 2015-04-30 | 2016-12-07 | 电信科学技术研究院 | A kind of interference information indicating method, interference delet method and device |
| CN109802733B (en) * | 2017-11-17 | 2022-06-10 | 华为技术有限公司 | Method and apparatus for signal measurement |
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| CN1925361A (en) * | 2005-09-01 | 2007-03-07 | 大唐移动通信设备有限公司 | Method for crossing time slot distribution of resources in CDMA/time-division duplex system |
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| CN1925361A (en) * | 2005-09-01 | 2007-03-07 | 大唐移动通信设备有限公司 | Method for crossing time slot distribution of resources in CDMA/time-division duplex system |
| CN1980462A (en) * | 2005-12-09 | 2007-06-13 | 中兴通讯股份有限公司 | Method for eliminating common-frequency interference in time-division multiple-address honeycomb communication system |
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