CN102118767A - 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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- CN102118767A CN102118767A CN2009102480553A CN200910248055A CN102118767A CN 102118767 A CN102118767 A CN 102118767A CN 2009102480553 A CN2009102480553 A CN 2009102480553A CN 200910248055 A CN200910248055 A CN 200910248055A CN 102118767 A CN102118767 A CN 102118767A
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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 a kind of method and base station that is used to discern the user of cell edge, are used for Inter-Cell Interference Coordination.
Background technology
In LTE (Long Term Evolution) system, the task of Inter-Cell Interference Coordination comprises Radio Resource is managed, and makes that the interference of minizone is controlled.Nearly all inter-cell interference coordination method needs all to know whether UE (subscriber equipment) is in the edge of sub-district.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 big.Traditional can not accurately discern the UE of cell edge, and therefore the actual performance of ICIC (Inter-Cell Interference Coordination) be caused very big influence based on the recognition methods of path loss.
The main stream approach of identification Cell Edge User is based on that UE carries out the estimating path loss of Serving cell.But there are some shortcomings in this method.For example, because the cause of actual network topology, be difficult to dispose predefined threshold value, power headroom reporting (PHR) (power headroomreport-PHR) be not carry out in real time (but only when when carrying out new emission or PHR just carry out the power report when being triggered).Simple foundation is not enough to determine to the path loss of Serving cell whether UE really is in the ICIC edge of sub-district, and can not reflect that to the path loss of Serving cell which sub-district is the strongest neighbor cell of received signal of UE.
Be positioned at cell edge although Fig. 1 shows UE2 on the geographical position, may not can disturb neighbor cell, this is because signal is blocked by building, therefore can not think that this user is the user of ICIC cell edge.Because Serving cell is difficult to discern the UE of cell edge according to path loss, this will cause very big influence to the actual performance of ICIC.Therefore need find the user's of more efficiently identification cell edge scheme.
Summary of the invention
The method that the purpose of this invention is to provide a kind of UE of effective recognition cell edge, it can discern the edge whether UE is in the sub-district based on the measurement report of UE, can greatly improve the performance of ICIC algorithm.
In one aspect of the invention, proposed a kind of method of discerning Cell Edge User, comprised step: be used to adjudicate the measurement configuration messages whether subscriber equipment entered or left cell edge to the subscriber equipment transmission; Receive the measurement report of subscriber equipment; Judge based on the type of described measurement report whether this user enters or leave cell edge.
According to embodiments of the invention, described method also comprises step: leave the measurement report of cell edge if receive this user of expression, then this user is removed from the Cell Edge User set.
According to embodiments of the invention, described method also comprises step: enter the measurement report of cell edge if receive this user of expression, then this user is added in the Cell Edge User set.
According to embodiments of the invention, described cell edge region is the zone of ICIC cell edge.
According to embodiments of the invention, the skew that is used for the incident relevant with ICIC should be less than the skew that is used for the incident relevant with handover.
According to embodiments of the invention, described measurement configuration is the interior frequently configuration of measuring.
In another aspect of this invention, provide a kind of base station of discerning Cell Edge User, having comprised: the RRC unit is used to dispose the measurement configuration whether the judgement subscriber equipment entered or left cell edge; Transmit-Receive Unit is used to adjudicate the measurement configuration messages whether subscriber equipment entered or left cell edge to the subscriber equipment transmission, and receives the measurement report of subscriber equipment; MAC layer unit judges based on the type of described measurement report whether this user enters or leave cell edge region.
Utilize above-mentioned configuration of the present invention, be easy to dispose the threshold value of a3 skew, even actual network topology is very complicated.Can determine the actual wireless position of UE in real time.Can reflect that sub-district is the strongest neighbor cell of UE.
Description of drawings
By below in conjunction with description of drawings the preferred embodiments of the present invention, will make above-mentioned and other purpose of the present invention, feature and advantage clearer, wherein:
Fig. 1 is a schematic diagram of describing the path loss from UE to the Serving cell;
Fig. 2 shows the schematic diagram of the relation between the signal of the signal of Serving cell and neighbor cell;
Fig. 3 shows the schematic diagram according to the base station of the embodiment of the invention; And
Fig. 4 shows the flow chart according to the method for the embodiment of the invention;
Embodiment
Below various embodiments of the present invention will be described.Explanation subsequently provides the detail to the complete understanding of these embodiment.But those skilled in the art should understand, and need not some described details and also can implement the present invention.In addition, may not can 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 that uses is used in combination with the detailed description of some specific embodiment of the present invention, also to explain this term with its wideest rational method in following explanation.Some term may be emphasized below. still, any preparation will partly give openly to reach clear and definite definition in embodiment with the term that certain limited mode makes an explanation.
One embodiment of the present of invention provide a kind of user's of effective recognition cell edge scheme, and it is discerned the user based on the measurement report of UE and whether is in cell edge, and can improve the performance of ICIC algorithm.
Fig. 3 shows the structural representation according to the base station of the embodiment of the invention.As shown in Figure 3, this base station comprises the Transmit-Receive Unit 13 of carrying out the information receiving and transmitting function, carries out the RRC unit 11 of RRC (eNB layer 3 agreement) function, carries out the MAC unit 14 of MAC layer (eNB layer 2 protocol) function and the memory cell 12 of storage data.
According to embodiments of the invention, carry out RRC unit 11 configurations of eNB RRC function and measure ID with corresponding three of incident A3: one is used for handover (HO), and two other is respectively applied for and enters the ICIC cell edge region and leave the ICIC cell edge region.The a3 skew that is used for the incident A3 relevant with ICIC should be less than the a3 skew of the incident A3 relevant with handover.When Transmit-Receive Unit 13 received the incident A3 that is used for ICIC, whether the MAC layer unit 14UE of the RRC unit 11 notice eNB of eNB entered the ICIC cell edge region or leaves the ICIC cell edge region.Like this, MAC layer unit 14 removes this UE based on above-mentioned information or it joined in the Cell Edge User set from the Cell Edge User set.For example, memory cell 12 is carried out read-write operation, so that the ID of Cell Edge User is added in the tabulation, perhaps deletion from tabulation.
In addition, when receiving the incident A3 that is used for handover, eNB will trigger conventional handover procedure, and RRC unit 11 reconfigures and the corresponding measurement ID of incident A3 report simultaneously.
Utilize above-mentioned scheme, be easy to dispose the threshold value of a3 skew, even actual network topology is very complicated; Can determine the actual wireless position of UE in real time; Can reflect that sub-district is the strongest neighbor cell of UE.
According to embodiments of the invention, 11 configurations of eNB RRC unit report that with incident A3 corresponding three are measured ID: one is used for handover, and two other is respectively applied for and enters the ICIC cell edge region and leave the ICIC cell edge region.The a3 skew that is used for the incident A3 relevant with ICIC should be less than the a3 skew that is used for the incident A3 relevant with handover.
In addition, eNB RRC unit 11 sends RRC by Transmit-Receive Unit 13 and connects and reconfigure message and measure in UE RRC sends frequently and dispose.
UE measures according to received measurement configuration messages execution, if the result who measures satisfies the condition that enters ICIC cell edge region A3 incident, then UE will and enter the corresponding incident A3 of measurement ID of ICIC cell edge region to the eNB report; If satisfy the condition of leaving ICIC cell edge region A3 incident, then UE is to eNB report and the corresponding incident A3 of measurement ID that leaves the ICIC cell edge region; If the result who measures satisfies the condition of the incident A3 that carries out handover, then UE will be to eNB report and the corresponding incident A3 of measurement ID that is used for handover.
When Transmit-Receive Unit 13 received the incident A3 that is used for ICIC, eNB RRC unit 11 entered the ICIC cell edge region to the MAC of eNB layer unit 14 notice UE, still leaves the ICIC cell edge region.When receiving the incident A3 that is used for handover, eNB will trigger conventional handover procedure, and therefore to reconfiguring with the corresponding measurement of incident A3 ID.
When eNB RRC unit 11 when the MAC of eNB layer unit 14 notice UE enter the ICIC cell edge region, the MAC layer unit of eNB joins this UE in the Cell Edge User set.When eNB RRC unit 11 when the MAC of eNB layer unit 14 notice UE leave the ICIC cell edge region, the MAC layer unit 14 of eNB removes this UE from the Cell Edge User set.
Like this, whether be in the edge of sub-district based on UE, UE is given with suitable allocation of radio resources in the MAC layer unit 14 of eNB, thereby has eliminated presence of intercell interference effectively, and has improved the QoS of Cell Edge User and the performance of whole system.
Fig. 2 shows the schematic diagram of the relation between the signal that Serving cell and neighbor cell are described.In this embodiment, disposed three at incident A3 and measured ID, measured ID for one and be used for handover, two other is respectively applied for and enters the ICIC cell edge region and leave the ICIC cell edge region.The a3 event offset of supposing to be used for handover is 0dB, and the a3 skew that is used to enter the ICIC cell edge region is-6dB.As can be seen from Figure 2, when UE when neighbor cell moves, if neighbor cell become than Serving cell good-6dB, the expression UE will enter cell edge region.If neighbor cell has become than the good 0dB of Serving cell, then it will enter handover procedure.
Fig. 4 shows the flow chart according to the user's of the identification cell edge of the embodiment of the invention method.This method determines based on the UE measurement report whether UE is in the edge of sub-district.
As shown in Figure 4, at step S1, UE has finished initial network insertion (RRC connects foundation).Then, at step S2, eNB RRC unit 11 just sends RRC connection reallocation message by Transmit-Receive Unit 13 and initiates to measure layoutprocedure, comprise with corresponding three of incident A3 and measure ID: one is used for handover, and two other is respectively applied for and enters the ICIC cell edge region and leave the ICIC cell edge region.
Then, at step S3, UE will return RRC connection reprovision and finish message.At step S4, set up the initial UE context.After the initial UE context is set up, the carrying of acquiescence will be set up.
At step S5～S7, if eNB RRC receives the incident A3 report that is used for ICIC, then whether eNB RRC unit 11 will enter the ICIC cell edge region or leave the ICIC cell edge region to eNB MAC layer unit 14 notice UE, and the MAC layer 14 of eNB joins UE in the Cell Edge User set or with it and shifts out from the Cell Edge User set in view of the above.
At step S8, if eNB RRC receives the incident A3 that is used for handover, then eNB RRC will initiate conventional handover procedure.
Like this, whether be in the edge of sub-district based on UE, UE is given with suitable allocation of radio resources in the MAC layer unit 14 of eNB, thereby has eliminated presence of intercell interference effectively, and has improved the QoS of Cell Edge User and the performance of whole system.
Unless context explicitly calls for, otherwise the implication that similar words such as " comprising " in whole specification and claims, " comprising " should be interpreted as comprising, rather than exclusive or exhaustive implication; That is to say, be the implication of " comprise, but be not limited to ".Employed here term " connection ", " coupling " or its modification mean two or more connection directly or indirectly or coupling between the multicomponent; Connection coupling between the element can be physically, in logic or its combination.
In addition, employed word " here ", " above-mentioned ", " following " and the word that contains similar meaning should relate to the application's full content among the application, rather than the application's specific part.When context allows, use the word of odd number or plural number also can comprise plural number or odd number respectively in the above-mentioned embodiment.All following explanations that covered this word about the word " perhaps " of two or more multiselect item tabulation: the discretionary choices in the tabulation, the Total Options in the tabulation, and the combination in any of option in the tabulation.
The above-mentioned detailed description of the embodiment of the invention be not exhaustive or be used to limit the present invention to above-mentioned clear and definite in form.Though above-mentionedly specific embodiment of the present invention and example are described, those skilled in the art will recognize that and to carry out various equivalent modifications within the scope of the invention with schematic purpose.
The enlightenment that the application is here provided not is must be applied in the said system, can also be applied in other system.Element and the effect of above-mentioned various embodiment can be combined so that more embodiment to be provided.
Can make amendment to the present invention according to above-mentioned detailed description.Though above-mentioned declarative description specific embodiment of the present invention and described the anticipated optimal set pattern, no matter how detailed explanation appearred hereinbefore, can implement the present invention with many modes.The details of above-mentioned bucking-out system is carried out in the details at it can carry out considerable variation, yet it still is included among the present invention disclosed herein.
Should be noted that as above-mentioned that employed specific term should not be used to be illustrated in when explanation some feature of the present invention or scheme redefines this term here with restriction of the present invention some certain features, feature or the scheme relevant with this term.In a word, should be with the terminological interpretation in the claims of enclosing, used for not limiting the invention to disclosed specific embodiment in the specification, unless above-mentioned detailed description part defines these terms clearly.Therefore, actual range of the present invention not only comprises the disclosed embodiments, also comprises according to claims implementing or carry out all equivalents of the present invention.
Claims (12)
1. method of discerning Cell Edge User comprises step:
Send to be used to adjudicate subscriber equipment whether or leave the measurement configuration messages that enters cell edge to subscriber equipment;
Receive the measurement report of subscriber equipment;
Judge based on the type of described measurement report whether this user enters or leave cell edge.
2. the method for claim 1 also comprises step:
Leave the measurement report of cell edge if receive this user of expression, then this user is removed from the Cell Edge User set.
3. the method for claim 1 also comprises step:
Enter the measurement report of cell edge if receive this user of expression, then this user is added in the Cell Edge User set.
4. the zone that the method for claim 1, wherein described cell edge region is the ICIC cell edge.
5. the skew that the method for claim 1, wherein is used for the incident relevant with ICIC should be less than the skew that is used for the incident relevant with handover.
6. the method for claim 1, wherein described measurement configuration is the interior frequently configuration of measuring.
7. base station of discerning Cell Edge User comprises:
The RRC unit is used to dispose the measurement configuration whether the judgement subscriber equipment entered or left cell edge;
Whether or leave the measurement configuration messages that enters cell edge Transmit-Receive Unit sends to be used to adjudicate subscriber equipment to subscriber equipment, and receives the measurement report of subscriber equipment;
MAC layer unit judges based on the type of described measurement report whether this user enters or leave cell edge region.
8. the measurement report of cell edge is left if receive this user of expression in base station as claimed in claim 7, and then MAC layer unit removes this user from the Cell Edge User set.
9. base station as claimed in claim 7 enters the measurement report of cell edge if receive this user of expression, and then MAC layer unit adds this user in the Cell Edge User set to.
10. base station as claimed in claim 7, wherein, described cell edge region is the zone of ICIC cell edge.
11. base station as claimed in claim 7, wherein, the skew that is used for the incident relevant with ICIC should be less than the skew that is used for the incident relevant with handover.
12. base station as claimed in claim 7, wherein, described measurement configuration is the interior frequently configuration of measuring.
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Cited By (5)
| 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 |
| CN103916338A (en) * | 2013-01-08 | 2014-07-09 | 索尼公司 | Wireless communication method and device |
| CN105247912A (en) * | 2013-05-29 | 2016-01-13 | 株式会社东芝 | Controller for allocating radio resource blocks and/or power for 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 |
| EP4381806A4 (en) * | 2021-08-04 | 2025-04-09 | Apple Inc | CONDITIONAL HANDOVERS FOR NON-TERRESTRIAL NETWORKS |
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| CN100426917C (en) * | 2004-06-16 | 2008-10-15 | 华为技术有限公司 | High-speed business switch-over method |
| CN100375575C (en) * | 2005-01-11 | 2008-03-12 | 大唐移动通信设备有限公司 | Measurement control method for switching between mobile communication cells |
| KR100810207B1 (en) * | 2005-07-22 | 2008-03-06 | 삼성전자주식회사 | Handover Method and Device Between Core Network Entities in Packet-switched Networks |
| CN101282559A (en) * | 2008-05-16 | 2008-10-08 | 中兴通讯股份有限公司 | Mobile commucation system as well as signal measurement method, base station and terminal thereof |
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Cited By (10)
| 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 |
| RU2566742C1 (en) * | 2011-10-19 | 2015-10-27 | Телефонактиеболагет Л М Эрикссон (Пабл) | Determination of ue location in cell |
| CN103916338A (en) * | 2013-01-08 | 2014-07-09 | 索尼公司 | Wireless communication method and device |
| WO2014108028A1 (en) * | 2013-01-08 | 2014-07-17 | 索尼公司 | Wireless communication method and wireless communication device |
| US10021701B2 (en) | 2013-01-08 | 2018-07-10 | Sony Corporation | Wireless communication method and wireless communication device |
| CN103916338B (en) * | 2013-01-08 | 2019-03-15 | 索尼公司 | Wireless communications method and wireless telecom equipment |
| CN105247912A (en) * | 2013-05-29 | 2016-01-13 | 株式会社东芝 | Controller for allocating radio resource blocks and/or power for user devices located in cells of a cellular network |
| CN105247912B (en) * | 2013-05-29 | 2019-03-22 | 株式会社东芝 | Controller for user equipment distribution radio resource block and/or power into the cell for being located at 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 |
| EP4381806A4 (en) * | 2021-08-04 | 2025-04-09 | Apple Inc | CONDITIONAL HANDOVERS FOR NON-TERRESTRIAL NETWORKS |
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