CN102917365A - Heterogeneous network interference coordinating method - Google Patents
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- CN102917365A CN102917365A CN2011102244844A CN201110224484A CN102917365A CN 102917365 A CN102917365 A CN 102917365A CN 2011102244844 A CN2011102244844 A CN 2011102244844A CN 201110224484 A CN201110224484 A CN 201110224484A CN 102917365 A CN102917365 A CN 102917365A
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Abstract
The invention provides a heterogeneous network interference coordinating method. The heterogeneous network interference coordinating method comprises the following steps: a micro base station macro eNB informs load information through a load, informing current master control carrier configuration information of a cell or currently-available carrier resource information of a femto base station Pico eNB notified to the femto base station, wherein available carrier resources do not comprise a currently-configured master control carrier of the micro base station; and the femto base station configures the master control carrier and an auxiliary control carrier of the cell according to the configuration information or the available carrier resource information and according to a principle that the micro base station and the femto base station have different carrier configurations. By the heterogeneous network interference coordinating method, the Pico eNB and the macro eNB are ensured to use different carrier configurations and interference on Pico peripheral UE (user equipment) on a control channel can be minimized so as to coordinate the interference.
Description
Technical field
The present invention relates to mobile communication technology, particularly relate to a kind of heterogeneous network disturbance coordination method.
Background technology
Existing studies show that introduced heterogeneous network in advanced (LTE-advanced) system of Long Term Evolution.Heterogeneous network refers to that macrocell lower floor has also disposed Microcell.Such as long-distance radio frequency unit (RRH), femto base station (Pico eNB), Home eNodeB (Home eNB) and relay base station (relay eNB).The introducing of these Microcells has caused more cell border areas, thereby has caused serious interference.In addition, the unbalanced power between grand Microcell has worsened this interference more.Two kinds of deployment are typically arranged under the heterogeneous network.A kind of is macro cell+femto cell, and another kind is macro cell+pico cell.Under two kinds of deployment, all there is serious interference problem.
In the deployment way of macro cell+pico cell or relay cell, disturb and mainly come from distributed area expansion (range expansion).Range expansion uses reference signal receiving intensity (RSRP) thresholding that is different from the tradition access in order to alleviate the macro base station burden.Specifically, UE is when judging access macrocell or Microcell, at the signal strength signal intensity RSRP from Microcell
MicroA side-play amount of upper increase (bias), bias is positive number, bias is normally configured by upper layer device, and generally can change semi-staticly.RSRP
MicroUpper increase bias again with signal strength signal intensity RSRP from macrocell
MacroRelatively, if RSRP
Micro+ bias 〉=RSRP
Macro, then UE selects the access Microcell; Otherwise UE selects the access macrocell.
Use range expansion technology, the UE among Fig. 1 in the Microcell extended region can suffer severe jamming.Its reason is, comes from the one hand from the weakening of Microcell signal receiving strength, and comes from the other hand the enhancing from the macrocell interference signal.The result is in the possibility that UE in the Microcell extended region scope can not correctly receive signal to be increased greatly, has further caused throughput of system decline.
How effectively to alleviate and even eliminate Microcell and introduce the key that the interference bring especially improves the LTE-advanced systematic function, improves throughput.Although the interference coordination solution of the data channel that Release8/9 provides can be continued to use, the interference of alleviating control channel needs new solution.In this respect, strengthening interference coordination is an important topic of needing solution badly.
The solution of a lot of control channels has been discussed by 3gPP forum, and wherein a solution is based on the interference coordination between multicarrier realization macro eNB and pico eNB.As shown in Figure 2, suppose to have two carrier wave f1 and f2, macro eNB to can be on any one carrier wave away from the macro UE of pico eNB control channel and data message; To reach the pico UE of close macro eNB near the macro UE of pico eNB, control information need to be transmitted at different carrier waves, and data message then can transmit at any carrier wave.The realization of above-mentioned interference coordination based on multicarrier need to guarantee that the carrier wave configuration of the transmission Physical Downlink Control Channel (PDCCH) that macro eNB and pico eNB make is different.Yet, a kind of different heterogeneous network disturbance coordination method of carrier wave configuration that can guarantee the transmission PDCCH that macro eNB and pico eNB make is not yet proposed at present.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of heterogeneous network disturbance coordination method, and the method can guarantee effectively that the carrier wave configuration of the transmission PDCCH that macro eNB and pico eNB make is different.
In order to achieve the above object, the technical scheme of the present invention's proposition is:
A kind of heterogeneous network disturbance coordination method, the method may further comprise the steps:
A, macro base station macro eNB utilize load notice load information message, the current available carrier resource information of the master control carrier configuration information that this residential quarter is current or femto base station pico eNB, notice is to described femto base station, do not comprise the master control carrier wave of the current configuration of described macro base station in the described available carrier resource;
B, described femto base station according to the different principle of master control carrier wave configuration of macro base station and femto base station, carry out the configuration of master control carrier wave and the auxiliary control carrier wave processed of this residential quarter according to described configuration information or described available carrier resource information.
In sum, the heterogeneous network disturbance coordination method that the present invention proposes, at first utilize load notice (load information) message that its presently used carrier wave configuring condition is notified to picoeNB by macro eNB, like this, pico eNB can determine the carrier wave configuration different from macro eNB according to this information, thereby can guarantee that the carrier wave that pico eNB and macro eNB use configures different, and then can minimize the interference that pico edge UE suffers at control channel, realize interference coordination
Description of drawings
Fig. 1 is the interference schematic diagram after the distributed area enlarges in the traditional heterogeneous network;
Fig. 2 is for having now based on the macro base station of multicarrier and the interference management schematic diagram of femto base station;
Fig. 3 is the schematic flow sheet of the embodiment of the invention one.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with the accompanying drawings and the specific embodiments.
Core concept of the present invention is: when interference coordination mechanism starts, require macro eNB and picoeNB between control interface transmit master control carrier wave and the auxiliary control carrier wave configuration state processed of a plurality of carrier waves, thereby auxiliary pico eNB avoids mutual conflict when determining himself carrier wave configuration, reduce disturbance is realized the interference coordination based on the heterogeneous network of carrier aggregation.
Fig. 3 is the schematic flow sheet of the embodiment of the invention one, and as shown in Figure 3, this embodiment may further comprise the steps:
Utilize the load notification message that the master control carrier configuration information of macro base station side is notified to femto base station in this step, like this, femto base station can carry out the carrier wave configuration accordingly, and is complementary with the carrier wave configuration of guaranteeing to be carried out two base stations.
Here need to prove, described master control carrier wave is the carrier wave on the ordinary meaning, and described auxiliary control carrier wave processed does not namely transmit the control information such as PDCCH or with the carrier wave of the control informations such as smaller power transmission PDCCH.Certainly, for guaranteeing backwards compatibility, some necessary control informations are not revised on two kinds of carrier waves.
Preferably, described load information message can also be carried the information that multicarrier interference coordination function is activated that is used to indicate, with the current multicarrier interference coordination function that activated of indication femto base station.
Particularly, can increase by two IE in load information message, namely master control carrier wave/auxiliary control carrier wave configuration mode processed information (PCC/SCC configuration pattern info) and master control carrier wave/auxiliary control carrier configuration information processed do not activate (PCC/SCC configuration information Inactive) two IE.Wherein, master control carrier wave/auxiliary control carrier wave configuration mode processed information cell carries the configuration information of master control carrier wave and auxiliary control carrier wave processed; Master control carrier wave/auxiliary control carrier configuration information processed does not activate cell and carries the information that multicarrier interference coordination function is activated that is used to indicate.
Preferably, can adopt the mode of multicarrier bit map to carry the master control carrier wave of described macro base station and the configuration information of auxiliary control carrier wave processed in described master control carrier wave/auxiliary control carrier wave configuration mode processed information cell, each position in the multicarrier bit map represents a carrier wave, value is that 1 expression PDCCH through-put power does not reduce expression master control carrier wave; Value is 0 expression PDCCH through-put power minimizing or is 0, expression auxiliary control carrier wave processed.N is carrier number total in the system.Having enumerated respectively the main carrier number in the table 1 is the configuration information PCC/SCC configuration pattern info of 1,2,4 o'clock corresponding master control carrier wave/auxiliary control carrier waves processed.
Table 1
Preferably, described load information message can also adopt the mode of the carrier identification number of carrying the master control carrier wave, notifies the master control carrier wave configuring condition of femto base station macro base station side.
Preferably, when described load information message carry be the current available carrier resource information of described pico eNB the time, can adopt the mode of multicarrier bit map to carry described available carrier resource and the configuration information of disabled carrier resource.Each position in the multicarrier bit map represents a carrier wave, and value is that 1 expression PDCCH through-put power does not reduce, and represents available carrier resource; Value is 0 expression PDCCH through-put power minimizing or is 0, represents disabled carrier resource.
Preferably, when described load information message carry be the current available carrier resource information of described pico eNB the time, can be directly with the carrier identification number notice of described available carrier resource to pico eNB.
Further, need the UE of Inter-Cell Interference Coordination to take control channel element (control channel element on the master control carrier wave that described Pico eNB can also configure it, CCE) ratio is notified the eNB to macro, so, help macro eNB to determine whether to use interference coordination based on multicarrier, to realize macro eNB and the self adaptation adjustment of pico eNB to carrying.Particularly, femto base station can by sending the resource status response message to described macro base station, be finished described notice.The state information cell (PCC utilization Status IE) that can utilize further the Pico eNB feedback master control carrier wave in this message to use carries above-mentioned information.
In addition, the master control carrier information that described Pico eNB can also configure it feeds back to described macro base station, and this feedback can utilize master control carrier information cell in the resource status response message (used PCC information IE) to realize.Preferably, this IE can be the carrier wave bitmap of a length N bits.Each position of bitmap represents a carrier wave, and value is that 1 this carrier wave of expression is the master control carrier wave; Value is that 0 this carrier wave of expression is not the master control carrier wave.This message feedback helps macro eNB to change its main carrier configuration according to its channel conditions.N is the carrier resource sum in the system.
Need to prove, the present invention in the specific implementation, need O﹠M system (OAM) in the carrier wave mapping of macro eNB and pico eNB end configuration consistency, thereby so that both sides can be known carrier wave corresponding to each bit among the PCC/SCC configuration pattern information.The carrier wave mapping is specially the bit among PCC/SCC configuration pattern information corresponding to different carrier identification.OAM when configuration, can be according to the bit string of the carrier frequency point ascending order in the existing bandwidth or the corresponding PCC/SCC configuration of descending pattern information from the 1st bit to the N bit.
Note new IE and the master control carrier wave of introducing, the definition of auxiliary control carrier wave processed is not limited to these titles, can be other arbitrarily titles.
In sum, above is preferred embodiment of the present invention only, is not for limiting protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a heterogeneous network disturbance coordination method is characterized in that, the method may further comprise the steps:
A, macro base station macro eNB utilize load notice load information message, the current available carrier resource information of the master control carrier configuration information that this residential quarter is current or femto base station pico eNB, notice is to described femto base station, do not comprise the master control carrier wave of the current configuration of described macro base station in the described available carrier resource;
B, described femto base station according to the different principle of master control carrier wave configuration of macro base station and femto base station, carry out the configuration of master control carrier wave and the auxiliary control carrier wave processed of this residential quarter according to described configuration information or described available carrier resource information.
2. method according to claim 1, it is characterized in that, the information of load described in step a message adopts the mode of multicarrier bit map to carry the master control carrier wave of described macro base station and the configuration information of auxiliary control carrier wave processed, and described load information message is carried the information that multicarrier interference coordination function is activated that is used to indicate simultaneously.
3. method according to claim 1 is characterized in that, the carrier identification that the described master control carrier configuration information that the information of load described in step a message is carried is described master control carrier wave number.
4. method according to claim 1 is characterized in that, the information of load described in step a message adopts the mode of multicarrier bit map to carry the current available carrier resource information of described pico eNB and disabled carrier resource information.
5. method according to claim 1 is characterized in that, the carrier identification that the current available carrier resource information of the described pico eNB that the information of load described in step a message is carried is described carrier resource number.
6. method according to claim 1 is characterized in that, further comprises among the step b: described femto base station notifies the master control carrier wave that configures to described macro base station.
7. method according to claim 1, it is characterized in that, femto base station described in the step b is by sending the resource status response message to described macro base station, to need to carry out the percent information of the shared control channel element of the UE control channelelement of Inter-Cell Interference Coordination on the master control carrier information that configure and the described master control carrier wave, notice is to described macro base station.
8. method according to claim 1 is characterized in that, described resource status response message adopts the mode of multicarrier bit map to carry master control carrier wave and the auxiliary control carrier information processed of described femto base station configuration.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104159315A (en) * | 2014-09-03 | 2014-11-19 | 广东顺德中山大学卡内基梅隆大学国际联合研究院 | Method and system for reducing inter-cell inference of wireless communication base station |
| CN112867011A (en) * | 2019-11-28 | 2021-05-28 | 上海华为技术有限公司 | Frequency spectrum resource multiplexing method and device |
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| CN101911752A (en) * | 2007-11-19 | 2010-12-08 | 高通股份有限公司 | The access point of configuration Femto cell |
| CN101960887A (en) * | 2008-02-26 | 2011-01-26 | 高通股份有限公司 | Efficient frequency assignment for mobile devices in coexisting wireless communication systems |
| CN101959197A (en) * | 2009-07-16 | 2011-01-26 | 三菱电机株式会社 | Be used for method and wireless network in the wireless network dividing frequency |
| CN102027771A (en) * | 2008-05-13 | 2011-04-20 | 高通股份有限公司 | Autonomous carrier selection for femtocells |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101911752A (en) * | 2007-11-19 | 2010-12-08 | 高通股份有限公司 | The access point of configuration Femto cell |
| CN101960887A (en) * | 2008-02-26 | 2011-01-26 | 高通股份有限公司 | Efficient frequency assignment for mobile devices in coexisting wireless communication systems |
| CN102027771A (en) * | 2008-05-13 | 2011-04-20 | 高通股份有限公司 | Autonomous carrier selection for femtocells |
| CN101959197A (en) * | 2009-07-16 | 2011-01-26 | 三菱电机株式会社 | Be used for method and wireless network in the wireless network dividing frequency |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104159315A (en) * | 2014-09-03 | 2014-11-19 | 广东顺德中山大学卡内基梅隆大学国际联合研究院 | Method and system for reducing inter-cell inference of wireless communication base station |
| CN104159315B (en) * | 2014-09-03 | 2018-07-13 | 广东顺德中山大学卡内基梅隆大学国际联合研究院 | Reduce the method and system of radio communication base station inter-cell interference |
| CN112867011A (en) * | 2019-11-28 | 2021-05-28 | 上海华为技术有限公司 | Frequency spectrum resource multiplexing method and device |
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