CN102118767B - Method for recognizing cell-edge users and base station - Google Patents
Method for recognizing cell-edge users and base station Download PDFInfo
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- CN102118767B CN102118767B CN200910248055.3A CN200910248055A CN102118767B CN 102118767 B CN102118767 B CN 102118767B CN 200910248055 A CN200910248055 A CN 200910248055A CN 102118767 B CN102118767 B CN 102118767B
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Abstract
The invention discloses a method for recognizing a cell-edge users and a base station. The method comprises the steps of: sending a measurement configuration message for judging whether user equipment enters or leaves a cell edge to the user equipment; receiving a measurement report of the user equipment; and judging whether the user enters or leaves the cell edge on the basis of the type of the measurement report. In the method disclosed by the invention, even though the network layout is very complex, a threshold value with A3 offset is very easy to configure, the actual wireless position of UE (user equipment) can be determined in real time, and which cell is the strongest adjacent cell of the UE can be reflected.
Description
Technical field
Embodiments of the invention relate to radio communication, are specifically related to method and the base station of a kind of user for identifying cell edge, for Inter-Cell Interference Coordination.
Background technology
In LTE (Long Term Evolution) system, the task of Inter-Cell Interference Coordination comprises and managing Radio Resource, makes the interference of minizone be controlled.Nearly all inter-cell interference coordination method all needs to know whether UE (subscriber equipment) is in the edge of community.The UE of center of housing estate disturbs the probability of neighbor cell very low, and the UE of cell edge disturbs the probability of neighbor cell very large.Traditional recognition methods based on path loss accurately can not identify the UE of cell edge, and therefore causes very large impact to the actual performance of ICIC (Inter-Cell Interference Coordination).
The main stream approach of identification Cell Edge User is carried out the estimating path loss of Serving cell based on UE.But there are some shortcomings in the method.Such as, due to the cause of the network topology of reality, be difficult to configure predefined threshold value, power headroom reporting (PHR) (power headroomreport-PHR) is not (but only when just carrying out power report when carrying out new transmitting or when PHR is triggered) of carrying out in real time.Simple foundation is not enough to determine whether UE is really in the ICIC edge of community to the path loss of Serving cell, and can not reflect which community is the neighbor cell that the Received signal strength of UE is the strongest to the path loss of Serving cell.
Although Fig. 1 shows UE2 be positioned at cell edge on geographical position, may can not disturb neighbor cell, this is because signal block by building, therefore can not think that this user is the user of ICIC cell edge.Because Serving cell is difficult to according to path loss the UE identifying cell edge, this causes very large impact by the actual performance of ICIC.Therefore the scheme of the user finding more efficiently identification cell edge is needed.
Summary of the invention
The object of this invention is to provide a kind of method of UE of effective identification cell edge, based on the measurement report of UE, it can identify whether UE is in the edge of community, greatly can improve the performance of ICIC algorithm.
In one aspect of the invention, propose a kind of method identifying Cell Edge User, comprise step: send the measurement configuration messages whether entering or leave cell edge for adjudicating subscriber equipment to subscriber equipment; Receive the measurement report of subscriber equipment; Type based on described measurement report judges whether this user enters or leave cell edge.
According to embodiments of the invention, described method also comprises step: represent that this user leaves the measurement report of cell edge if received, then this user removed from Cell Edge User set.
According to embodiments of the invention, described method also comprises step: represent that this user enters the measurement report of cell edge if received, then this user added in Cell Edge User set.
According to embodiments of the invention, described cell edge region is the region of ICIC cell edge.
According to embodiments of the invention, the skew for the event relevant to ICIC should be less than the skew for the event of being correlated with handover.
According to embodiments of the invention, described measurement configuration is that interior measurement configures frequently.
In another aspect of this invention, providing a kind of base station identifying Cell Edge User, comprising: RRC unit, whether entering or leaving the measurement configuration of cell edge for configuring judgement subscriber equipment; Transmit-Receive Unit, sends the measurement configuration messages whether entering or leave cell edge for adjudicating subscriber equipment, and receives the measurement report of subscriber equipment to subscriber equipment; MAC layer unit, the type based on described measurement report judges whether this user enters or leave cell edge region.
Utilize above-mentioned configuration of the present invention, be easy to the threshold value configuring a3 skew, even if the network topology of reality is very complicated.The actual wireless position of UE can be determined in real time.Can reflect that community is the strongest neighbor cell of UE.
Accompanying drawing explanation
By the preferred embodiments of the present invention being described below in conjunction with accompanying drawing, above-mentioned and other objects, features and advantages of the present invention will be made clearly, wherein:
Fig. 1 is the schematic diagram of the path loss described from UE to Serving cell;
Fig. 2 shows the schematic diagram of the relation between the signal of Serving cell and the signal of neighbor cell;
Fig. 3 shows the schematic diagram of the base station according to the embodiment of the present invention; And
Fig. 4 shows the flow chart of the method according to the embodiment of the present invention;
Embodiment
Various embodiments of the present invention will be described below.Explanation subsequently provides the detail of the complete understanding to these embodiments.But those skilled in the art should understand, also the present invention can be implemented without the need to details described in some.In addition, can not may illustrate or describe in detail some known structure or functions, in order to avoid unnecessarily make the related description of various embodiments of the present invention unclear.
Even the term used in the following description is combined with the detailed description of some specific embodiment of the present invention, also this term to be explained with its widest rational method.But some term may be emphasized below., the term that any preparation makes an explanation in certain limited mode will give open and clear and definite definition in embodiment part.
One embodiment of the present of invention provide the scheme of a kind of user of effective identification cell edge, and based on the measurement report of UE, it identifies whether user is in cell edge, and can improve the performance of ICIC algorithm.
Fig. 3 shows the structural representation of the base station according to the embodiment of the present invention.As shown in Figure 3, this base station comprises the Transmit-Receive Unit 13 performing information receiving and transmitting function, perform the RRC unit 11 of RRC (eNB layer 3 agreement) function, perform the MAC unit 14 of MAC layer (eNB layer 2 protocol) function and store the memory cell 12 of data.
According to embodiments of the invention, the RRC unit 11 performing eNB RRC function configures three measurements ID: corresponding with event A3 for handover (HO), and two other is respectively used to enter ICIC cell edge region and leave ICIC cell edge region.The a3 that a3 skew for the event A3 relevant to ICIC should be less than the event A3 be correlated with handover offsets.When Transmit-Receive Unit 13 receives the event A3 for ICIC, the RRC unit 11 of eNB notifies whether the MAC layer unit 14UE of eNB enters ICIC cell edge region or leave ICIC cell edge region.Like this, this UE to remove based on above-mentioned information or is joined in Cell Edge User set by MAC layer unit 14 from Cell Edge User set.Such as, read-write operation is carried out to memory cell 12, the ID of Cell Edge User is added in list, or delete from list.
In addition, when receiving the event A3 for handover, eNB will trigger conventional handover procedure, and RRC unit 11 reconfigures and reports corresponding measurement ID with event A3 simultaneously.
Utilize above-mentioned scheme, be easy to the threshold value configuring a3 skew, even if the network topology of reality is very complicated; The actual wireless position of UE can be determined in real time; Can reflect that community is the strongest neighbor cell of UE.
According to embodiments of the invention, the configuration of eNB RRC unit 11 and event A3 report that corresponding three are measured ID: one for handover, and two other is respectively used to enter ICIC cell edge region and leave ICIC cell edge region.The a3 that a3 for the event A3 relevant to ICIC offsets the event A3 that be less than for being correlated with handover offsets.
In addition, eNB RRC unit 11 sends RRC by Transmit-Receive Unit 13 and connects and reconfigure message and come to send frequently to UE RRC to measure configuration.
UE performs measurement according to received measurement configuration messages, if the result measured meets the condition entering ICIC cell edge region A3 event, then UE reports the event A3 corresponding with the measurement ID entering ICIC cell edge region by eNB; If meet the condition leaving ICIC cell edge region A3 event, then UE reports the event A3 corresponding with the measurement ID leaving ICIC cell edge region to eNB; If the result measured meets the condition of the event A3 carrying out handover, then UE reports the event A3 corresponding with the measurement ID being used for handover by eNB.
When Transmit-Receive Unit 13 receives the event A3 for ICIC, to the MAC layer unit 14 of eNB, eNB RRC unit 11 notifies that UE enters ICIC cell edge region, still leave ICIC cell edge region.When receiving the event A3 for handover, eNB will trigger conventional handover procedure, and therefore reconfigures the measurement ID corresponding with event A3.
When to the MAC layer unit 14 of eNB, eNB RRC unit 11 notifies that UE enters ICIC cell edge region, this UE joins in Cell Edge User set by the MAC layer unit of eNB.When to the MAC layer unit 14 of eNB, eNB RRC unit 11 notifies that UE leaves ICIC cell edge region, this UE removes by the MAC layer unit 14 of eNB from Cell Edge User set.
Like this, whether be in the edge of community based on UE, suitable allocation of radio resources to UE, thus is effectively eliminated presence of intercell interference by the MAC layer unit 14 of eNB, and improves the QoS of Cell Edge User and the performance of whole system.
Fig. 2 shows the schematic diagram of the relation illustrated between Serving cell and the signal of neighbor cell.In this embodiment, be configured with three measure ID for event A3, measure ID for one and be used for handover, two other is respectively used to enter ICIC cell edge region and leave ICIC cell edge region.Supposing that the a3 event offset being used for handover is 0dB, is-6dB for entering the a3 skew of ICIC cell edge region.As can be seen from Figure 2, when UE moves towards neighbor cell, if neighbor cell becomes-6dB better than Serving cell, represent that UE will enter cell edge region.If neighbor cell becomes 0dB better than Serving cell, then it will enter handover procedure.
Fig. 4 shows the flow chart of the method for the user of the identification cell edge according to the embodiment of the present invention.Based on UE measurement report, the method determines whether UE is in the edge of community.
As shown in Figure 4, initial network insertion (RRC connection establishment) is completed in step S1, UE.Then, in step S2, eNB RRC unit 11 just sends RRC connection reallocation message by Transmit-Receive Unit 13 and initiates to measure layoutprocedure, comprise three measurements ID: corresponding with event A3 for handover, two other is respectively used to enter ICIC cell edge region and leave ICIC cell edge region.
Then, RRC connection reprovision will be returned in step S3, UE and complete message.In step S4, set up initial UE context.After initial UE context is set up, the carrying of acquiescence will be set up.
In step S5 ~ S7, if the event A3 that eNB RRC receives for ICIC reports, then to eNB MAC layer unit 14, eNB RRC unit 11 will notify whether UE enters ICIC cell edge region or leave ICIC cell edge region, and UE joins in Cell Edge User set or by it and shifts out from Cell Edge User set by the MAC layer 14 of eNB accordingly.
In step S8, if eNB RRC receives the event A3 for handover, then eNB RRC will initiate conventional handover procedure.
Like this, whether be in the edge of community based on UE, suitable allocation of radio resources to UE, thus is effectively eliminated presence of intercell interference by the MAC layer unit 14 of eNB, and improves the QoS of Cell Edge User and the performance of whole system.
Unless the context clearly requires otherwise, otherwise " comprising ", " comprising " in whole specification and claims etc., similar word should be interpreted as the implication that comprises instead of exclusive or exhaustive implication; That is, be the implication of " comprise, but be not limited to ".Term " connection " used here, " coupling " or its modification, mean connection directly or indirectly or coupling between two or more element; Butt coupling between element can be physically, in logic or its combine.
In addition, the word " here " used in the application, " above-mentioned ", " below " and the word containing similar meaning should relate to the full content of the application, instead of the specific part of the application.When context allows, in above-mentioned embodiment, use the word of odd number or plural number also can comprise plural number or odd number respectively.About two or more option list word " or " cover all following explanation of this word: the discretionary choices in list, the total Options in list, and the combination in any of option in list.
The above-mentioned detailed description of the embodiment of the present invention is not exhaustive or above-mentioned clear and definite formal for limiting the present invention to.Although the above-mentioned explanation with illustrative purposes specific embodiment of the present invention and example, those skilled in the art will recognize that and can carry out various equivalent modifications within the scope of the invention.
The enlightenment that the application is provided here is not must be applied in said system, can also be applied in other system.The element of above-mentioned various embodiment and effect can be combined to provide more embodiment.
Can modify to the present invention according to above-mentioned detailed description.Although description above describe specific embodiment of the present invention and describe anticipated optimal set pattern, no matter there is how detailed description hereinbefore, the present invention can be implemented by many modes.The details of above-mentioned bucking-out system performs in details can carry out considerable change at it, but it is still included in the present invention disclosed herein.
It should be noted that the specific term used when some feature of the present invention or scheme are described should not be used for representing as described above and redefine this term here to limit of the present invention some certain features, feature or the scheme relevant to this term.In a word, should by the terminological interpretation used in the claims of enclosing for not limiting the invention to specific embodiment disclosed in specification, unless above-mentioned detailed description part explicitly defines these terms.Therefore, actual range of the present invention not only comprises the disclosed embodiments, also comprises according to claims enforcement or performs all equivalents of the present invention.
Claims (12)
1. identification is positioned at a method for the subscriber equipment of cell edge region, comprises step:
Configure corresponding to A3 event entering the measurement ID of cell edge region and the measurement ID for leaving cell edge region;
Send the measurement ID that comprises for entering cell edge region and the measurement configuration messages for the measurement ID that leaves cell edge region to subscriber equipment, described measurement configuration messages is that RRC connects and reconfigures message;
Receive the measurement report of subscriber equipment, the described measurement report instruction event corresponding with the measurement ID for entering cell edge region or the event corresponding with the measurement ID for leaving cell edge region;
According to described measurement report, determine that subscriber equipment enters or leaves cell edge region; And
Enter based on subscriber equipment or leave cell edge region, to user equipment allocation Radio Resource to eliminate presence of intercell interference.
2. the method for claim 1, also comprises step:
If described measurement report represents that subscriber equipment leaves cell edge region, then subscriber equipment is removed from Cell Edge User set.
3. the method for claim 1, also comprises step:
If described measurement report represents that subscriber equipment enters cell edge region, then subscriber equipment is added in Cell Edge User set.
4. the method for claim 1, wherein described cell edge region is the region of ICIC cell edge.
5. the method for claim 1, wherein should be less than the skew for the event of being correlated with handover for the skew of the event relevant to ICIC.
6. the method for claim 1, wherein described measurement configuration is that interior measurement configures frequently.
7. identification is positioned at a base station for the subscriber equipment of cell edge region, comprising:
RRC unit, it is configured for the measurement ID that enters cell edge region and the measurement ID for leaving cell edge region;
Transmit-Receive Unit, it sends the measurement ID that comprises for entering cell edge region and the measurement configuration messages for the measurement ID that leaves cell edge region to subscriber equipment, wherein, described measurement configuration messages is that RRC connection reconfigures message, and receive the measurement report of subscriber equipment, the described measurement report instruction event corresponding with the measurement ID for entering cell edge region or the event corresponding with the measurement ID for leaving cell edge region; And
MAC layer unit, it is according to described measurement report, determines that subscriber equipment enters or leaves cell edge region, and enters based on subscriber equipment or leave cell edge region, to user equipment allocation Radio Resource to eliminate presence of intercell interference.
8. base station as claimed in claim 7, wherein, if described measurement report represents that user leaves cell edge region, then subscriber equipment removes by MAC layer unit from Cell Edge User set.
9. base station as claimed in claim 7, wherein, if described measurement report represents that subscriber equipment enters cell edge region, then subscriber equipment adds in Cell Edge User set by MAC layer unit.
10. base station as claimed in claim 7, wherein, described cell edge region is the region of ICIC cell edge.
11. base stations as claimed in claim 7, wherein, the skew for the event relevant to ICIC should be less than the skew for the event of being correlated with handover.
12. base stations as claimed in claim 7, wherein, described measurement configuration is that interior measurement configures frequently.
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2013056394A1 (en) * | 2011-10-19 | 2013-04-25 | Telefonaktiebolaget L M Ericsson (Publ) | Determination of ue location in a cell |
| CN103916338B (en) * | 2013-01-08 | 2019-03-15 | 索尼公司 | Wireless communications method and wireless telecom equipment |
| US10433299B2 (en) * | 2013-05-29 | 2019-10-01 | Kabushiki Kaisha Toshiba | Controller for allocating radio resource blocks to user devices located in cells of a cellular network |
| WO2022155972A1 (en) * | 2021-01-25 | 2022-07-28 | 北京小米移动软件有限公司 | Cell handover method and apparatus, communication device and storage medium |
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Address after: 201206 Pudong New Area, Nanjing Road, No. 388, Shanghai Patentee after: Shanghai NOKIA Baer Limited by Share Ltd Address before: 201206 Pudong New Area, Nanjing Road, No. 388, Shanghai Patentee before: Shanghai Alcatel-Lucent Co., Ltd. |