CN103167550B - Overload indication message sending method and system, overload Indication message control device - Google Patents
Overload indication message sending method and system, overload Indication message control device Download PDFInfo
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- CN103167550B CN103167550B CN201110407952.1A CN201110407952A CN103167550B CN 103167550 B CN103167550 B CN 103167550B CN 201110407952 A CN201110407952 A CN 201110407952A CN 103167550 B CN103167550 B CN 103167550B
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Abstract
The open a kind of overload indication message sending method of the present invention and system, overload Indication message control device.Wherein in overload indication message sending method, that measures each Physical Resource Block on up direction with predetermined time interval is disturbed grade, generates overload Indication message; Judge to transship whether to exist in Indication message be greater than predetermined threshold be disturbed grade; If there is the level of interference being greater than predetermined threshold in overload Indication message, in neighbor cell, select outdoor base station; By X2 interface, overload Indication message is sent to outdoor base station.Thus guaranteeing, under the prerequisite realizing Inter-Cell Interference Coordination performance, to save the resource of X2 interface.
Description
Technical field
The present invention relates to moving communicating field, particularly relate to overload indication message sending method and system, overload Indication message control device.
Background technology
(Long Term Evolution is called for short: LTE) be third generation partner program (The 3 Long Term Evolution
rdgeneration Partner Project, is called for short: e-learning quality standard 3GPP) organized to set up.LTE drastically increases physical layer transmission ability, reduces system complexity, therefore becomes the direction that radio network technique finds.
The physical layer of LTE adopts OFDM (Orthogonal Frequency DivisionMultiplexing, abbreviation: OFDM) technology, each community can use whole frequency band.When the edge of neighbor cell uses same frequency band, because Cell Edge User needs larger transmitted power to overcome path loss, thus larger interference is caused to adjacent cell, i.e. presence of intercell interference.Therefore, in LTE system, require carry out resource between neighbor cell coordinated allocation and user scheduling, to reduce the impact of presence of intercell interference.
For this reason, in LTE, define and send overload instruction (OverloadIndication by X2 interface, be called for short: OI) message, in order to the interfere information between mutual neighbor cell, assist the Resourse Distribute and user scheduling that carry out between base station, implement efficient inter-cell interference coordination mechanism.Concrete, source base station sends OI message to show corresponding Physical Resource Block (Physical Resource Block to target BS, be called for short: the overload class PRB), the target BS receiving OI message needs to check whether the user in this base station cell causes interference to origin base station cell.In LTE, OI message 2 bits represent overload class corresponding with each PRB, and overload class is divided into height, neutralizes low third gear.
Fig. 1 is the schematic diagram being sent OI message in prior art by X2 interface, wherein:
Step 101, that measures each Physical Resource Block on up direction with predetermined time interval is disturbed grade, generates overload Indication message.
Step 102, judge to transship whether to exist in Indication message be greater than predetermined threshold be disturbed grade.
Step 103, if there is the level of interference being greater than predetermined threshold in overload Indication message, sends to target BS by X2 interface by overload Indication message.
Based on OI message, can interactive interference information between neighbor cell, thus reduce presence of intercell interference to the impact of systematic function.But owing to causing the user of interference may from any one community adjacent with origin base station cell to origin base station cell, so OI message also must be sent to the target BS in each neighbor cell by source base station, therefore OI message will take the more resource of X2 interface.In addition, when origin base station cell is outdoor cell, more indoor cell or multiple indoor base station is there is in the coverage of origin base station cell, because the user of indoor base station service is positioned at indoor, and there is larger transmission between outdoor base station or other indoor base stations to isolate, therefore at up direction, the interference of indoor user to outdoor base station or other indoor base stations almost can be ignored.In other words, the interference of outdoor base station community or other indoor base station cell up directions is unlikely caused by indoor user.Therefore, under indoor scene, it is unnecessary for sending OI message to indoor base station, and causes the waste of X2 interface resource.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of overload indication message sending method and system, overload Indication message control device, thus is guaranteeing, under the prerequisite realizing Inter-Cell Interference Coordination performance, to save the resource of X2 interface.
According to an aspect of the present invention, provide a kind of overload indication message sending method, comprising:
That measures each Physical Resource Block on up direction with predetermined time interval is disturbed grade, generates overload Indication message;
Judge to transship whether to exist in Indication message be greater than predetermined threshold be disturbed grade;
If there is the level of interference being greater than predetermined threshold in overload Indication message, in neighbor cell, select outdoor base station;
By X2 interface, overload Indication message is sent to described outdoor base station.
According to an aspect of the present invention, provide a kind of overload Indication message control device, comprise measuring unit, the first recognition unit, the second recognition unit, transmitting element, wherein:
Measuring unit, is disturbed grade for what measure each Physical Resource Block on up direction with predetermined time interval, generates overload Indication message;
First recognition unit, for the overload Indication message generated according to measuring unit, judge to transship whether to exist in Indication message be greater than predetermined threshold be disturbed grade;
Second recognition unit, for the judged result according to the first recognition unit, if there is the level of interference being greater than predetermined threshold in overload Indication message, then selects outdoor base station in neighbor cell;
Transmitting element, for the selection result according to the second recognition unit, sends to described outdoor base station by X2 interface by overload Indication message.
According to an aspect of the present invention, provide a kind of overload Indication message transmitting system, comprise source base station and multiple target BS, source base station comprises overload Indication message control device, wherein:
Overload Indication message control device, is disturbed grade for what measure each Physical Resource Block on up direction with predetermined time interval, generates overload Indication message, judge whether to exist in overload Indication message be greater than predetermined threshold be disturbed grade; If there is the level of interference being greater than predetermined threshold in overload Indication message, in multiple target BS, select outdoor base station; By X2 interface, overload Indication message is sent to described outdoor base station;
Outdoor base station, for receiving the overload Indication message that described overload Indication message control device sends, and carries out power control and/or path loss compensating operation according to described overload Indication message.
The present invention being greater than the level of interference of predetermined threshold by existing in overload Indication message, in neighbor cell, selecting outdoor base station, by X2 interface, overload Indication message is sent to described outdoor base station.Thus guaranteeing, under the prerequisite realizing Inter-Cell Interference Coordination performance, to save the resource of X2 interface.
Description of the invention provides in order to example with for the purpose of describing, and is not exhaustively or limit the invention to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Selecting and describing embodiment is in order to principle of the present invention and practical application are better described, and enables those of ordinary skill in the art understand the present invention thus design the various embodiments with various amendment being suitable for special-purpose.
Accompanying drawing explanation
Fig. 1 is the schematic diagram sending OI message in prior art.
Fig. 2 is that the schematic diagram of an indication message sending method embodiment is transshipped in the present invention.
Fig. 3 is that the schematic diagram of another embodiment of indication message sending method is transshipped in the present invention.
Fig. 4 is that the schematic diagram of an Indication message control device embodiment is transshipped in the present invention.
Fig. 5 is that the schematic diagram of an Indication message control device embodiment is transshipped in the present invention.
The schematic diagram of an Indication message transmitting system embodiment is transshipped in Fig. 6 the present invention.
Embodiment
With reference to the accompanying drawings the present invention is described more fully, exemplary embodiment of the present invention is wherein described.
Fig. 2 is that the schematic diagram of an indication message sending method embodiment is transshipped in the present invention.As shown in Figure 2, the overload indication message sending method of this embodiment is as follows:
Step 201, that measures each Physical Resource Block on up direction with predetermined time interval is disturbed grade, generates overload Indication message.
Step 202, judge to transship whether to exist in Indication message be greater than predetermined threshold be disturbed grade.
Step 203, if there is the level of interference being greater than predetermined threshold in overload Indication message, selects outdoor base station in neighbor cell.
Step 204, sends to described outdoor base station by X2 interface by overload Indication message.
Based on the overload indication message sending method that the above embodiment of the present invention provides, when being greater than the level of interference of predetermined threshold by existing in overload Indication message, in neighbor cell, select outdoor base station, by X2 interface, overload Indication message is sent to outdoor base station.Thus guaranteeing, under the prerequisite realizing Inter-Cell Interference Coordination performance, to save the resource of X2 interface.
According to another specific embodiment of the present invention, according to the Base Station Identification of base station in neighbor cell, in neighbor cell, select outdoor base station.
According to another specific embodiment of the present invention, by measuring the interference thermal noise ratio of each Physical Resource Block on up direction, (Interference over Thermal Noise, is called for short: IoT); And determine each Physical Resource Block according to the proportionate relationship of IoT and predetermined threshold be disturbed grade.
Fig. 3 is that the schematic diagram of another embodiment of indication message sending method is transshipped in the present invention.As shown in Figure 3, the overload indication message sending method of this embodiment is as follows:
Step 301, that measures each Physical Resource Block on up direction with predetermined time interval is disturbed grade, generates overload Indication message.
Step 302, judge to transship whether to exist in Indication message be greater than predetermined threshold be disturbed grade.If there is not the level of interference being greater than predetermined threshold in overload Indication message, then return step 301; If there is the level of interference being greater than predetermined threshold in overload Indication message, then perform step 303.
Step 303, whether judging to be disturbed grade, to be greater than the PRB of predetermined threshold all unoccupied, if be disturbed grade, to be greater than the PRB of predetermined threshold all unoccupied, then return step 301; If at least one is disturbed grade, to be greater than the PRB of predetermined threshold occupied, then perform step 304.
For all unappropriated situation of PRB being disturbed grade and being greater than predetermined threshold, although now there is presence of intercell interference, but be greater than the PRB of predetermined threshold and unoccupied owing to being disturbed grade, presence of intercell interference now can't impact other business, OI message can not be sent by X2 interface, thus the resource of X2 interface can be saved further.
Step 304, selects outdoor base station in neighbor cell.
Step 305, sends to described outdoor base station by X2 interface by overload Indication message.
Be described for table 1 below.Table 1 is schematic OI message, relates to 5 PRB altogether, and setting is when occurring in OI message that the grade of PRB sends this OI message when being high.In Table 1, the grade of the 3rd PRB is only had for high.By the inspection of source base station scheduler, find now the 3rd PRB unoccupied, then now need not send this OI message, thus save the resource of X2 interface.
| PRB | 1 | 2 | 3 | 4 | 5 |
| Grade | Low | In | High | In | Low |
Table 1
Fig. 4 is that the schematic diagram of an Indication message control device embodiment is transshipped in the present invention.As shown in Figure 4, overload Indication message control device comprises measuring unit 401, first recognition unit 402, second recognition unit 403, transmitting element 404, wherein:
Measuring unit 401, is disturbed grade for what measure each Physical Resource Block on up direction with predetermined time interval, generates overload Indication message.
First recognition unit 402, for the overload Indication message generated according to measuring unit 401, judge to transship whether to exist in Indication message be greater than predetermined threshold be disturbed grade.
Second recognition unit 403, for the judged result according to the first recognition unit 402, if there is the level of interference being greater than predetermined threshold in overload Indication message, then selects outdoor base station in neighbor cell.
Transmitting element 404, for the selection result according to the second recognition unit 403, sends to outdoor base station by X2 interface by overload Indication message.
Based on the overload Indication message control device that the above embodiment of the present invention provides, when being greater than the level of interference of predetermined threshold by existing in overload Indication message, in neighbor cell, select outdoor base station, by X2 interface, overload Indication message is sent to outdoor base station.Thus guaranteeing, under the prerequisite realizing Inter-Cell Interference Coordination performance, to save the resource of X2 interface.
According to another specific embodiment of the present invention, the second recognition unit 403, specifically according to the Base Station Identification of base station in neighbor cell, selects outdoor base station in neighbor cell.
According to another specific embodiment of the present invention, measuring unit 401 specifically measures the interference thermal noise ratio of each Physical Resource Block on up direction, and that determines each Physical Resource Block according to the proportionate relationship of described interference thermal noise ratio and predetermined threshold is disturbed grade.
Fig. 5 is that the schematic diagram of another embodiment of Indication message control device is transshipped in the present invention.Shown in Fig. 5, except the measuring unit 401 related in Fig. 4, first recognition unit 402, second recognition unit 403, outside transmitting element 404, also comprise the 3rd recognition unit 501, for the judged result according to the first recognition unit 401, if there is the level of interference being greater than predetermined threshold in overload Indication message, whether then judging to be disturbed grade, to be greater than the Physical Resource Block of predetermined threshold all unoccupied, if at least one is disturbed grade, to be greater than the Physical Resource Block of predetermined threshold occupied, the second recognition unit 403 is then indicated to perform the operation selecting outdoor base station in neighbor cell.
According to another specific embodiment of the present invention, 3rd recognition unit 501 also for be disturbed grade be greater than the Physical Resource Block of predetermined threshold all unoccupied time, instruction measuring unit 401 performs the grade that is disturbed measuring each Physical Resource Block on up direction with predetermined time interval and transships the operation of Indication message to generate.
According to another specific embodiment of the present invention, first recognition unit 402 also for transship there is not the level of interference being greater than predetermined threshold in Indication message time, instruction measuring unit 401 performs the grade that is disturbed measuring each Physical Resource Block on up direction with predetermined time interval and transships the operation of Indication message to generate.
Fig. 6 is that the schematic diagram of an Indication message transmitting system embodiment is transshipped in the present invention.As shown in Figure 6, overload Indication message transmitting system comprises source base station 601 and multiple target BS 602, and source base station 601 comprises overload Indication message control device 611, wherein:
Overload Indication message control device 611, is disturbed grade for what measure each Physical Resource Block on up direction with predetermined time interval, generates overload Indication message, judge whether to exist in overload Indication message be greater than predetermined threshold be disturbed grade; If there is the level of interference being greater than predetermined threshold in overload Indication message, in multiple target BS, select outdoor base station; By X2 interface, overload Indication message is sent to described outdoor base station.
Outdoor base station, for receiving the overload Indication message that described overload Indication message control device 611 sends, and carries out power control and/or path loss compensating operation according to described overload Indication message.
Based on the overload Indication message transmitting system that the above embodiment of the present invention provides, when being greater than the level of interference of predetermined threshold by existing in overload Indication message, in neighbor cell, select outdoor base station, by X2 interface, overload Indication message is sent to outdoor base station.Thus guaranteeing, under the prerequisite realizing Inter-Cell Interference Coordination performance, to save the resource of X2 interface.
According to another specific embodiment of the present invention, overload Indication message control device 611 be Fig. 4 or embodiment illustrated in fig. 5 in the overload Indication message control device that relates to.
Claims (12)
1. an overload indication message sending method, is characterized in that, comprising:
That measures each Physical Resource Block on up direction with predetermined time interval is disturbed grade, generates overload Indication message;
Judge to transship whether to exist in Indication message be greater than predetermined threshold be disturbed grade;
If there is the level of interference being greater than predetermined threshold in overload Indication message, in neighbor cell, select outdoor base station, wherein according to the Base Station Identification of base station in neighbor cell, in neighbor cell, select outdoor base station;
By X2 interface, overload Indication message is sent to described outdoor base station.
2. method according to claim 1, is characterized in that,
Described judge overload Indication message in exist be greater than predetermined threshold be disturbed grade after, also comprise:
Whether judging to be disturbed grade, to be greater than the Physical Resource Block of predetermined threshold all unoccupied, if at least one is disturbed grade, to be greater than the Physical Resource Block of predetermined threshold occupied, then perform the step selecting outdoor base station in neighbor cell.
3. method according to claim 2, is characterized in that,
If being disturbed grade, to be greater than the Physical Resource Block of predetermined threshold all unoccupied, then perform the grade that is disturbed measuring each Physical Resource Block on up direction with predetermined time interval and transship the step of Indication message to generate.
4. method according to claim 1, is characterized in that,
If there is not the level of interference being greater than predetermined threshold in overload Indication message, then perform the grade that is disturbed measuring each Physical Resource Block on up direction with predetermined time interval and transship the step of Indication message to generate.
5. method according to claim 1, is characterized in that,
On described measurement up direction, the grade that is disturbed of each Physical Resource Block comprises:
Measure the interference thermal noise ratio of each Physical Resource Block on up direction;
That determines each Physical Resource Block according to interference thermal noise ratio and the proportionate relationship of predetermined threshold is disturbed grade.
6. an overload Indication message control device, is characterized in that, comprise measuring unit, the first recognition unit, the second recognition unit, transmitting element, wherein:
Measuring unit, is disturbed grade for what measure each Physical Resource Block on up direction with predetermined time interval, generates overload Indication message;
First recognition unit, for the overload Indication message generated according to measuring unit, judge to transship whether to exist in Indication message be greater than predetermined threshold be disturbed grade;
Second recognition unit, for the judged result according to the first recognition unit, if there is the level of interference being greater than predetermined threshold in overload Indication message, then in neighbor cell, select outdoor base station, wherein according to the Base Station Identification of base station in neighbor cell, in neighbor cell, select outdoor base station;
Transmitting element, for the selection result according to the second recognition unit, sends to described outdoor base station by X2 interface by overload Indication message.
7. overload Indication message control device according to claim 6, it is characterized in that, overload Indication message control device also comprises the 3rd recognition unit, for the judged result according to the first recognition unit, if there is the level of interference being greater than predetermined threshold in overload Indication message, whether then judging to be disturbed grade, to be greater than the Physical Resource Block of predetermined threshold all unoccupied, if at least one is disturbed grade, to be greater than the Physical Resource Block of predetermined threshold occupied, then indicate the second recognition unit to perform the operation selecting outdoor base station in neighbor cell.
8. overload Indication message control device according to claim 7, is characterized in that,
3rd recognition unit also for be disturbed grade be greater than the Physical Resource Block of predetermined threshold all unoccupied time, instruction measuring unit performs the grade that is disturbed measuring each Physical Resource Block on up direction with predetermined time interval and transships the operation of Indication message to generate.
9. overload Indication message control device according to claim 6, is characterized in that,
When first recognition unit also for not existing the level of interference being greater than predetermined threshold in overload Indication message, the execution of instruction measuring unit is disturbed grade to generate the operation of overload Indication message with each Physical Resource Block on predetermined time interval measurement up direction.
10. overload Indication message control device according to claim 6, is characterized in that,
Measuring unit specifically measures the interference thermal noise ratio of each Physical Resource Block on up direction, and that determines each Physical Resource Block according to the proportionate relationship of described interference thermal noise ratio and predetermined threshold is disturbed grade.
11. 1 kinds of overload Indication message transmitting systems, it is characterized in that, system comprises source base station and multiple target BS, and source base station comprises overload Indication message control device, wherein:
Described overload Indication message control device, is disturbed grade for what measure each Physical Resource Block on up direction with predetermined time interval, generates overload Indication message, judge whether to exist in overload Indication message be greater than predetermined threshold be disturbed grade; If there is the level of interference being greater than predetermined threshold in overload Indication message, then in multiple target BS, select outdoor base station according to Base Station Identification; By X2 interface, overload Indication message is sent to described outdoor base station;
Described outdoor base station, for receiving the overload Indication message that described overload Indication message control device sends, and carries out power control and/or path loss compensating operation according to described overload Indication message.
12. systems according to claim 11, is characterized in that,
The overload Indication message control device of overload Indication message control device according to any one of claim 6-10.
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| CN101505495A (en) * | 2008-02-05 | 2009-08-12 | 夏普株式会社 | Interference coordination method and base station for uplink FDM cellular communication system |
| CN101854635A (en) * | 2009-04-03 | 2010-10-06 | 中兴通讯股份有限公司 | Method and system for transmitting intercell interference coordination indication information |
| CN101998642A (en) * | 2009-08-19 | 2011-03-30 | 株式会社Ntt都科摩 | Inter-cell interference coordination method and station |
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| US8503364B2 (en) * | 2009-07-14 | 2013-08-06 | Qualcomm Incorporated | Broadcast signaling L1 overload indication |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101505495A (en) * | 2008-02-05 | 2009-08-12 | 夏普株式会社 | Interference coordination method and base station for uplink FDM cellular communication system |
| CN101854635A (en) * | 2009-04-03 | 2010-10-06 | 中兴通讯股份有限公司 | Method and system for transmitting intercell interference coordination indication information |
| CN101998642A (en) * | 2009-08-19 | 2011-03-30 | 株式会社Ntt都科摩 | Inter-cell interference coordination method and station |
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