CN102083124B - Method and system for dynamically feeding back system information sent and received by CoMP (Cooperation Multi-Point) - Google Patents
Method and system for dynamically feeding back system information sent and received by CoMP (Cooperation Multi-Point) Download PDFInfo
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- CN102083124B CN102083124B CN200910241373.7A CN200910241373A CN102083124B CN 102083124 B CN102083124 B CN 102083124B CN 200910241373 A CN200910241373 A CN 200910241373A CN 102083124 B CN102083124 B CN 102083124B
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Abstract
The invention discloses a method for dynamically feeding back system information sent and received by a CoMP (Cooperation Multi-Point). The method comprises the following steps of: dividing base stations (BS) in a wireless communication network into a plurality of system information feedback sets; selecting one of the BS as a main feedback BS in each system information feedback set; and feeding system information back to a user terminal (UT) by the main feedback BS. The invention also discloses a system for dynamically feeding back system information sent and received by a CoMP (Cooperation Multi-Point). In the invention, through the arrangement of the system information feedback sets, the BS in the wireless communication network is divided into a plurality of sets, thereby the feedback expense of the system information is reduced; in addition, the quantity of BS requiring the system information feedback is reduced, thereby a signaling interaction process and other physical processes while system information feedback are reduced so that the system expense is effectively reduced.
Description
Technical field
The present invention relates to wireless communication field, relate in particular to a kind of system information dynamical feedback method and system of CoMP sending and receiving.
Background technology
In follow-on broadband wireless communication network, how to improve throughput and average UT throughput, the particularly throughput of cell edge UT and the problem of peak rate of inter-cell user terminal (UT, UserTerminate), face a severe challenge.At present, at Institute of Electrical and Electric Engineers (IEEE, Instituteof Electrical and Electronics Engineers) 802.16j, IMT-Advanced (IMT-Advanced, International Mobile Telecom-Advanced), newly wireless (WINNER of wireless world plan, Wireless World Initiative New Radio) in all propose to adopt the method for multipoint cooperative (CoMP, Collaborative Multiple Point) sending and receiving to solve the problems referred to above.
CoMP sending and receiving, refers between the base station (BS, BaseStation) of multiple cooperations on identical Radio Resource and single UT and combines sending and receiving.CoMP sending and receiving has two essential characteristics:
1, each UT can cooperate by BS on identical Radio Resource, by multiple BS federated service.By such way, the Recombinant Interferon α-2b of minizone is alleviated, or changes into useful signal power.
2, each BS can serve multiple UT on identical Radio Resource.By such way, the throughput of all sectors is enhanced.
But in the implementation process of CoMP sending and receiving, it is a UT service that multiple BS of cooperation are used identical resource, can cause the waste of resource; In the up link that has presence of intercell interference, when selecting the UT of cell edge to be carried out to CoMP sending and receiving, can cause serious presence of intercell interference simultaneously, thereby UT throughput, peak rate and the average UT throughput of cell edge are significantly reduced.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of system information dynamical feedback method and system of CoMP sending and receiving, when realizing CoMP sending and receiving, saving resource, reduces presence of intercell interference.
For achieving the above object, technical scheme of the present invention is achieved in that
The system information dynamical feedback method of a kind of multipoint cooperative provided by the present invention (CoMP) sending and receiving, the method comprises:
Base station in cordless communication network (BS) is divided into the set of multiple system informations feedback, and selects primary feedback BS in the set of each system information feedback, by described primary feedback BS to user terminal (UT) reponse system information.
Described cordless communication network is divided into the set of multiple system informations feedback, is specially:
Determine bandwidth ability and the performance requirement of described UT, and according to described bandwidth ability and performance requirement, system information feedback Resource selection threshold value is set;
According to described system information feedback Resource selection threshold value, described cordless communication network is divided into the set of multiple system information feedback.
The bandwidth ability of described UT and performance requirement, comprising: the throughput of path loss, propagation conditions, UT and peak rate.
The method further comprises: in the set of each system information feedback, selecting the BS of intercell interference is primary feedback BS.
Described by primary feedback BS to UT reponse system information, be specially:
Described UT measures the wireless environment situation of self, and measurement result is reported to the BS of the described UT of service;
Receive the BS of measurement result by described system information feedback Resource selection threshold value, compare with described measurement result, determine that the system information feedback under described BS is gathered;
Described BS sends to described UT by system information by the primary feedback BS in the set of affiliated system information feedback.
The method further comprises:
If the system information feedback set under definite described BS is one, the primary feedback BS transmitting system information in gathering by described system information feedback is to UT; If determine that the affiliated system information feedback set of described BS is for multiple, the primary feedback BS transmitting system information in gathering by each system information feedback is to UT.
The present invention also provides a kind of system information dynamic feedback system of CoMP sending and receiving, BS in described system is divided into the set of multiple system information feedback, and in each system feedback set, be provided with primary feedback BS, described primary feedback BS is used for to UT reponse system information.
Described BS is further used for, and determines bandwidth ability and the performance requirement of described UT, and according to described bandwidth ability and performance requirement, system information feedback Resource selection threshold value is set; According to described system information feedback Resource selection threshold value, the BS in described cordless communication network is divided into the set of multiple system information feedback.
The bandwidth ability of described UT and performance requirement, comprising: the throughput of path loss, propagation conditions, UT and peak rate.
Described BS is further used for, and in the set of each system information feedback, selecting the BS of intercell interference is primary feedback BS.
Described BS is further used for, and receives the measurement result that UT reports by the wireless environment situation of measuring self, and by described system information feedback Resource selection threshold value, compares with described measurement result, determines the system information feedback set under described BS; System information is sent to described UT by the primary feedback BS in the set of affiliated system information feedback.
Described BS is further used for, and when the system information feedback set under determining described BS is one, the primary feedback BS transmitting system information in gathering by described system information feedback is to UT; When the system information feedback set under definite described BS is multiple, the primary feedback BS transmitting system information in gathering by each system information feedback is to UT.
The system information dynamical feedback method and system of a kind of CoMP sending and receiving provided by the present invention, BS in cordless communication network is divided into the set of multiple system information feedback, and in the set of each system information feedback, select primary feedback BS, by primary feedback BS to UT reponse system information.The setting of feeding back set by system information, is divided into multiple set by the BS in cordless communication network, has reduced the feedback overhead of system information, has saved resource; In addition, need the BS quantity of reponse system information to reduce, Signalling exchange and other physical processes while having reduced system information feedback, as the number of times of mixed automatic retransfer (HARQ), and then effectively reduce overhead; And can reduce presence of intercell interference, thereby UT throughput, peak rate and the average UT throughput of cell edge are significantly improved.
Accompanying drawing explanation
Fig. 1 is the flow chart of the system information dynamical feedback method of a kind of CoMP sending and receiving of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the technical solution of the present invention is further elaborated.
When realizing CoMP sending and receiving, saving resource, reduction presence of intercell interference, the system information dynamical feedback method of a kind of CoMP sending and receiving provided by the present invention, its core concept is: the BS in cordless communication network is divided into the set of multiple system information feedback, and in the set of each system information feedback, select primary feedback BS, by primary feedback BS to UT reponse system information.
Based on above-mentioned core concept, the system information dynamical feedback method of a kind of CoMP sending and receiving provided by the present invention, as shown in Figure 1, mainly comprises the following steps:
Wherein, the bandwidth ability of UT and performance requirement can comprise: the throughput of path loss, propagation conditions, UT and peak rate etc.Certainly, the bandwidth ability in the present invention and performance requirement are not limited only to above-mentioned lifted parameter, also can be according to actual needs, expand to other parameter.
The present invention is dividing after the set of multiple system information feedback, and can in each system feedback set, select the BS of intercell interference is primary feedback BS.The system information of one type is only fed back in each system information feedback set of dividing, and the BS in the set of system information feedback can only be by the primary feedback BS reponse system information of selecting.
For the division of system information feedback set, to be divided into two set as example, BS contrasts the parameter in the bandwidth ability of UT and performance requirement and system information feedback Resource selection threshold value, if the parameter in bandwidth ability and performance requirement is greater than this threshold value, this BS is divided in set 1; If be less than this threshold value, this BS is divided in set 2.And while being divided into multiple set, corresponding system information feedback Resource selection threshold value is multiple.
The measurement result that UT reports comprises the parameters such as path loss, presence of intercell interference, but the measurement result in the present invention is not limited only to this, can also expand according to actual needs.
For example, if the parameter in measurement result is less than threshold value 1, determine that BS belongs to set 1; If the parameter in measurement result is greater than threshold value 1, but be less than threshold value 2, determine that BS belongs to set 2; If the parameter in measurement result is greater than threshold value 2, but be less than threshold value 3, determine that BS belongs to set 3; If the parameter in measurement result is greater than threshold value 3, determine that BS belongs to set 4.
Here it should be noted that, when carrying out system information feedback set division, a BS can only belong to the set of a system information feedback, also can belong to the set of multiple system information feedback.If determine that the system information feedback set under BS is one, need feed back primary feedback BS transmitting system information in gathering to UT by system information; If determine that the system information feedback set under BS is multiple, need by the primary feedback BS transmitting system information in the set of each system information feedback to UT.
For realizing the system information dynamical feedback method of above-mentioned CoMP sending and receiving, the system information dynamic feedback system of a kind of CoMP sending and receiving provided by the present invention, BS is wherein divided into the set of multiple system information feedback, and in each system feedback set, be provided with primary feedback BS, primary feedback BS is used for to UT reponse system information.
BS is further used for, and determines bandwidth ability and the performance requirement of UT, and according to bandwidth ability and performance requirement, system information feedback Resource selection threshold value is set; According to system information feedback Resource selection threshold value, the BS in cordless communication network is divided into the set of multiple system information feedback.Wherein, the bandwidth ability of UT and performance requirement, comprising: the throughput of path loss, propagation conditions, UT and peak rate etc.
BS is further used for, and in the set of each system information feedback, selecting the BS of intercell interference is primary feedback BS.Receive the measurement result that UT reports by the wireless environment situation of measuring self, and system information is fed back to Resource selection threshold value, compare with measurement result, determine the system information feedback set under BS; System information is sent to UT by the primary feedback BS in the set of affiliated system information feedback.Concrete: when the system information feedback set under determining BS is one, by system information, feed back primary feedback BS transmitting system information in gathering to UT; When the system information feedback set under definite BS is multiple, the primary feedback BS transmitting system information in gathering by each system information feedback is to UT.
In sum, the system information dynamical feedback method and system of a kind of CoMP sending and receiving provided by the present invention, feeds back the setting of gathering by system information, the BS in cordless communication network is divided into multiple set, has reduced the feedback overhead of system information; In addition, need the BS quantity of reponse system information to reduce, Signalling exchange and other physical processes while having reduced system information feedback, as mixed automatic retransfer (HARQ, Hybrid Automatic Repeat Request) number of times, and then effectively reduce overhead; And can reduce presence of intercell interference, thereby UT throughput, peak rate and the average UT throughput of cell edge are significantly improved.
The above, be only preferred embodiment of the present invention, is not intended to limit protection scope of the present invention.
Claims (8)
1. a system information dynamical feedback method for multipoint cooperative (CoMP) sending and receiving, is characterized in that, the method comprises:
Base station in cordless communication network (BS) is divided into the set of multiple system informations feedback, and selects primary feedback BS in the set of each system information feedback, by described primary feedback BS to user terminal (UT) reponse system information; Wherein,
Described cordless communication network is divided into the set of multiple system informations feedback, comprises:
Determine bandwidth ability and the performance requirement of described UT, and according to described bandwidth ability and performance requirement, system information feedback Resource selection threshold value is set;
According to described system information feedback Resource selection threshold value, described cordless communication network is divided into the set of multiple system information feedback; Wherein, the bandwidth ability of described UT and performance requirement, comprising: the throughput of path loss, propagation conditions, UT and peak rate.
2. the system information dynamical feedback method of CoMP sending and receiving according to claim 1, is characterized in that, the method further comprises: in the set of each system information feedback, selecting the BS of intercell interference is primary feedback BS.
3. the system information dynamical feedback method of CoMP sending and receiving according to claim 2, is characterized in that, described by primary feedback BS to UT reponse system information, be specially:
Described UT measures the wireless environment situation of self, and measurement result is reported to the BS of the described UT of service;
Receive the BS of measurement result by described system information feedback Resource selection threshold value, compare with described measurement result, determine that the system information feedback under described BS is gathered;
Described BS sends to described UT by system information by the primary feedback BS in the set of affiliated system information feedback.
4. the system information dynamical feedback method of CoMP sending and receiving according to claim 3, is characterized in that, the method further comprises:
If the system information feedback set under definite described BS is one, the primary feedback BS transmitting system information in gathering by described system information feedback is to UT; If determine that the affiliated system information feedback set of described BS is for multiple, the primary feedback BS transmitting system information in gathering by each system information feedback is to UT.
5. the system information dynamic feedback system of a CoMP sending and receiving, it is characterized in that, BS in described system is divided into the set of multiple system information feedback, and is provided with primary feedback BS in each system feedback set, and described primary feedback BS is used for to UT reponse system information; Wherein,
Described BS is further used for, and determines bandwidth ability and the performance requirement of described UT, and according to described bandwidth ability and performance requirement, system information feedback Resource selection threshold value is set; According to described system information feedback Resource selection threshold value, the BS in described cordless communication network is divided into the set of multiple system information feedback; Wherein, the bandwidth ability of described UT and performance requirement, comprising: the throughput of path loss, propagation conditions, UT and peak rate.
6. the system information dynamic feedback system of CoMP sending and receiving according to claim 5, is characterized in that, described BS is further used for, and in the set of each system information feedback, selecting the BS of intercell interference is primary feedback BS.
7. the system information dynamic feedback system of CoMP sending and receiving according to claim 6, it is characterized in that, described BS is further used for, receive the measurement result that UT reports by the wireless environment situation of measuring self, and by described system information feedback Resource selection threshold value, compare with described measurement result, determine that the system information feedback under described BS is gathered; System information is sent to described UT by the primary feedback BS in the set of affiliated system information feedback.
8. the system information dynamic feedback system of CoMP sending and receiving according to claim 7, it is characterized in that, described BS is further used for, when the system information feedback set under determining described BS is one, the primary feedback BS transmitting system information in gathering by described system information feedback is to UT; When the system information feedback set under definite described BS is multiple, the primary feedback BS transmitting system information in gathering by each system information feedback is to UT.
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| CN102843729B (en) * | 2011-06-22 | 2017-03-15 | 中兴通讯股份有限公司 | CoMP system information updating method and main serving cell |
| WO2013166710A1 (en) * | 2012-05-11 | 2013-11-14 | 富士通株式会社 | Information feedback method, user equipment and base station for coordinated multi-point |
| PL3100555T3 (en) * | 2014-01-31 | 2017-09-29 | Telefonaktiebolaget Lm Ericsson (Publ) | Methods and nodes relating to system information acquisition during flexible subframe operation |
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| CN101132632A (en) * | 2007-09-25 | 2008-02-27 | 中国科学技术大学 | Master-salve cooperating communication method in distributed radio communication system |
| CN101373998A (en) * | 2007-08-20 | 2009-02-25 | 上海贝尔阿尔卡特股份有限公司 | Low information interactive multi-base station collaboration MIMO as well as scheduling method and apparatus thereof |
| CN101442808A (en) * | 2008-12-26 | 2009-05-27 | 西安电子科技大学 | United scheduling method for ascending multi-point collaboration in LTE-A |
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| CN101373998A (en) * | 2007-08-20 | 2009-02-25 | 上海贝尔阿尔卡特股份有限公司 | Low information interactive multi-base station collaboration MIMO as well as scheduling method and apparatus thereof |
| CN101132632A (en) * | 2007-09-25 | 2008-02-27 | 中国科学技术大学 | Master-salve cooperating communication method in distributed radio communication system |
| CN101442808A (en) * | 2008-12-26 | 2009-05-27 | 西安电子科技大学 | United scheduling method for ascending multi-point collaboration in LTE-A |
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