CN102026361B - Interference coordination method and system - Google Patents
Interference coordination method and system Download PDFInfo
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- CN102026361B CN102026361B CN 200910092560 CN200910092560A CN102026361B CN 102026361 B CN102026361 B CN 102026361B CN 200910092560 CN200910092560 CN 200910092560 CN 200910092560 A CN200910092560 A CN 200910092560A CN 102026361 B CN102026361 B CN 102026361B
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Abstract
The invention discloses an interference coordination method, which comprises that: user equipment (UE) feeds interference user equipment (I-UE) which is a relay back to a base station; the base station increases the scheduling information of the I-UE in a relay physical downlink control channel (R-PDCCH) aiming at the relay, and transmits the R-PDCCH to the relay; and the relay allocates time-frequency resources orthogonal to time-frequency resources used by the I-UE on an access link of the relay according to the received scheduling information so as to realize interference coordination. Meanwhile, the invention discloses an interference coordination system. The method and the system can better realize interference coordination in a long-term evolution-advanced (LTE-A) system.
Description
Technical field
The present invention relates to mobile communication technology, particularly a kind of disturbance coordination method and system.
Background technology
Novel relaying cellular communication system; In senior Long Term Evolution (LTE-A) system; Introduced type I (Type I) relaying, the introducing of this relaying will bring bigger coverage and the power system capacity of Geng Gao for the LTE-A system, but simultaneously; The introducing of this relaying also can bring various interference, like interference between multi-user interference, center of housing estate and cell edge multi-user interference and cooperating relay between the sector etc.
As shown in Figure 1, Fig. 1 is the composition structural representation of existing LTE-A system.Wherein, directly be called grand UE in the terminal (UE) of service by base station (eNB), the UE that is directly served by relaying (RN) is called R-UE.As grand UE during near the edge zone of relaying coverage; If the up access link resource between grand UE and base station is identical with the up access link resource of R-UE and relay well; Relaying will listen to the ul transmissions between grand UE and base station so; That is to say, can cause occurring between two up access link disturbing.
Similarly; The base station also may be listened to by R-UE to the downlink transmission of grand UE; That is to say,, then can cause occurring between two down links disturbing if down-chain resource between base station and grand UE and the down-chain resource that is relayed between the R-UE are identical.
In practical application, usually the grand UE of the edge zone near the relaying coverage shown in Figure 1 is called and disturbs UE (I-UE).
For avoiding above-mentioned interference that practical communication is impacted, need carry out interference coordination.
In the LTE system; Interference coordination is meant a kind of scheduling strategy that comes reinforced cell edge customer data transfer rate through the consideration presence of intercell interference; Promptly through the scheduler in the sub-district to up link and down-chain resource, comprise that time, frequency and power etc. carry out certain constraint.
At present, the disturbance coordination method in the LTE system mainly comprises: the method for soft frequency/partial frequency multiplexing, and the method for utilizing overload indication (OI)/high interference indication (HII) message to control.Wherein, the partial frequency multiplexing method is meant through certain mode the running time-frequency resource of sub-district is divided, and makes the user of each cell edge use mutually orthogonal running time-frequency resource, thereby avoids interference.The implementation of soft-frequency reuse method and partial frequency multiplexing method are similar.And the method for utilizing OI/HII message to control mainly is to carry out the mutual of some signalings through the X2 interface between the adjacent cell; Like OI message; When the uplink interference of this sub-district surpasses certain thresholding, promptly send OI message, according to the OI message that receives to neighbor cell; Neighbor cell control interference source user, and reduce transmitting power and reschedule sequence of operations such as resource.
But above-mentioned disturbance coordination method is mainly used in the LTE system, for the LTE-A system, because the improvement of aspects such as system configuration and performance; So above-mentioned interference coordination mode can not well be suitable for, and also there is certain defective above-mentioned disturbance coordination method in itself; Such as, for the method that the above-mentioned OI/HII of utilization message is controlled, OI message has the delay of 20ms when X2 interface transmits; So cause the interference coordination function in time not start, and, after taking place, this incident triggers the method for interference coordination again; Solve owing to can not before incident takes place, be about to problem, so actual effect is unsatisfactory.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of disturbance coordination method, can realize the interference coordination in the LTE-A system preferably.
Another object of the present invention is to provide a kind of interference coordination system, can realize the interference coordination in the LTE-A system preferably.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of disturbance coordination method comprises:
Terminal UE to base station feedback from as the interfered with terminal I-UE of a relaying;
Said base station increases the schedule information of said I-UE in being directed against the relaying Physical Downlink Control Channel R-PDCCH of said relaying, and said R-PDCCH is sent to said relaying;
Said relaying distributes the running time-frequency resource orthogonal time frequency resources of using with said I-UE according to the schedule information that receives on the access link of self, realize interference coordination.
Preferably, said UE, further comprised before the I-UE as a relaying to base station feedback: UE confirms to comprise from the I-UE as a relaying:
UE confirms self to be within the coverage of said base station; And receive from said signal of base station intensity with receive from the difference of the signal strength signal intensity of said relaying greater than zero and less than predefined first threshold, then confirm from I-UE as said relaying.
Preferably, the schedule information of said I-UE comprises: the running time-frequency resource that the sign of said I-UE and said I-UE use;
Said relaying is known the running time-frequency resource that said I-UE uses according to said schedule information.
Preferably, said base station is comprising to the schedule information that increases said I-UE among the R-PDCCH of said relaying:
Said base station is carried out the combined coding modulation with schedule information and the said base station of said I-UE to the control information of said relaying.
Preferably, this method further comprises:
UE to base station feedback from as the associating terminal C-UE of a relaying;
Said base station increases the schedule information of said C-UE in the R-PDCCH of the relaying that feeds back to said C-UE, and said R-PDCCH is sent to the relaying of said C-UE feedback; Simultaneously, said base station increases the sign of the relaying of said C-UE feedback when said C-UE sends data in the destination address tabulation;
The relaying of said C-UE feedback carries out joint transmission according to the schedule information and the data message that receive to said C-UE and base station.
Preferably, said UE, further comprised before the C-UE as a relaying to base station feedback: UE confirms to comprise from the C-UE as a relaying:
UE confirms self to be within the coverage of said base station; And receive from said signal of base station intensity with receive from the difference of the signal strength signal intensity of the relaying of said C-UE feedback greater than zero and less than predefined second threshold value, then confirm from C-UE as said relaying.
Preferably, the schedule information of said C-UE comprises: the running time-frequency resource that the sign of said C-UE, said C-UE use, and control information transmission.
Preferably, the schedule information of said base station said C-UE of increase in the R-PDCCH of the relaying that feeds back to said C-UE comprises:
Said base station is carried out the combined coding modulation with schedule information and the said base station of said C-UE to the control information of the relaying of said C-UE feedback.
Preferably, this method further comprises:
UE through main relaying to base station feedback from as the C-UE of a cooperating relay; Simultaneously, said main relaying is to the schedule information of the said C-UE of said base station feedback;
Said base station increases the schedule information of said C-UE in being directed against the R-PDCCH of said cooperating relay, and said R-PDCCH is sent to said cooperating relay;
Said cooperating relay is distributed the running time-frequency resource orthogonal time frequency resources of using with said C-UE according to the schedule information that receives on the access link of self;
Said C-UE sends data to said main relaying;
Said main relaying and said cooperating relay receive the data from said C-UE simultaneously;
Said main relaying and said cooperating relay are carried out encoding process, and upload data to said base station respectively;
Joint-detection and reception are carried out in said base station.
Preferably, the schedule information of said C-UE comprises: the running time-frequency resource that the sign of said C-UE, said C-UE use, and control information transmission.
Preferably, this method further comprises:
UE through main relaying to base station feedback from as the C-UE of a cooperating relay; Simultaneously, said main relaying is to the schedule information of the said C-UE of said base station feedback;
Said base station increases the schedule information of said C-UE in being directed against the R-PDCCH of said cooperating relay, and said R-PDCCH is sent to said cooperating relay;
Simultaneously, said base station increases the sign of said cooperating relay when said main relaying sends data in the destination address tabulation;
Said cooperating relay is obtained said schedule information and data message, and said C-UE and said main relaying are carried out joint transmission.
Preferably, the schedule information of said C-UE comprises: the running time-frequency resource that the sign of said C-UE, said C-UE use, and coded message.
Preferably, said UE, further comprised before oneself C-UE as a cooperating relay of base station feedback through main relaying: said UE confirms to comprise from the C-UE as a cooperating relay:
Said UE confirms self to be in the coverage of a main relaying; And receive from the signal strength signal intensity of said main relaying with receive from the difference of the signal strength signal intensity of said cooperating relay greater than zero and less than predefined the 3rd threshold value, then confirm from C-UE as said cooperating relay.
Preferably, said R-PDCCH adopts high-order modulating.
A kind of interference coordination system comprises:
Interfered with terminal I-UE is used for to base station feedback from the I-UE as a relaying;
Said base station is used in the schedule information that increases said I-UE to the relaying Physical Downlink Control Channel R-PDCCH of said relaying, and said R-PDCCH is sent to said relaying;
Said relaying is used for according to the schedule information that receives, and on the access link of self, distributes the running time-frequency resource orthogonal time frequency resources of using with said I-UE, realizes interference coordination.
Preferably, this system further comprises:
Associating terminal C-UE is used for to base station feedback from the C-UE as a relaying;
Said base station is further used for, and in the R-PDCCH of the relaying that feeds back to said C-UE, increases the schedule information of said C-UE, and said R-PDCCH is sent to the relaying of said C-UE feedback; Simultaneously, when said C-UE sends data message, in the destination address tabulation, increase the sign of the relaying of said C-UE feedback;
The relaying of said C-UE feedback is used for according to the schedule information and the data message that receive said C-UE and said base station being carried out joint transmission.
Preferably, this system further comprises:
C-UE, be used for main relaying through self place to said base station feedback from as the C-UE of a cooperating relay;
Said main relaying is used for the schedule information to the said C-UE of said base station feedback;
Said base station is further used for, and in being directed against the R-PDCCH of said cooperating relay, increases the schedule information of said C-UE, and said R-PDCCH is sent to said cooperating relay;
Said cooperating relay is used for according to the schedule information that receives, and on the access link of self, distributes the running time-frequency resource orthogonal time frequency resources of using with said C-UE;
Said C-UE is further used for, and sends data to said main relaying;
Said main relaying and said cooperating relay are further used for, and receive the data from said C-UE simultaneously, and carry out encoding process, upload data to said base station respectively afterwards;
Said base station is further used for, and the data that said main relaying and cooperating relay are uploaded are carried out joint-detection and reception.
Preferably, this system further comprises:
C-UE is used for through main relaying to base station feedback from as the C-UE of a cooperating relay;
Said main relaying is used for the schedule information to the said C-UE of said base station feedback;
Said base station is further used for, and in being directed against the R-PDCCH of said cooperating relay, increases the schedule information of said C-UE, and said R-PDCCH is sent to said cooperating relay; Simultaneously, said base station increases the sign of said cooperating relay when said main relaying sends data in the destination address tabulation;
Said cooperating relay is used to obtain said schedule information and data message, and said C-UE and said main relaying are carried out joint transmission.
It is thus clear that, adopt technical scheme of the present invention, utilize R-PDCCH to carry the schedule information of I-UE, and send to the relaying that this I-UE is caused interference; Like this, this relaying can distribute the running time-frequency resource orthogonal time frequency resources of using with I-UE according to the schedule information that receives on the access link of self, thereby realizes interference coordination.In addition, scheme according to the invention also can realize the CoMP service through the schedule information that in R-PDCCH, increases C-UE, thereby has enlarged the range of application of scheme according to the invention.
Description of drawings
Fig. 1 is the composition structural representation of existing LTE-A system.
Fig. 2 is the transmission plan sketch map of existing a kind of return link.
Fig. 3 is existing multiplex mode sketch map.
Fig. 4 is the flow chart of disturbance coordination method embodiment of the present invention.
Fig. 5 is the control channel sketch map under the disturbance coordination method according to the invention.
Fig. 6 serves the flow chart of first embodiment for CoMP of the present invention.
Fig. 7 is the control channel sketch map under the CoMP service according to the invention.
Fig. 8 makes the sketch map of CoMP service to the UE in a certain relaying coverage for a plurality of relayings in the embodiment of the invention.
Fig. 9 serves the flow chart of second embodiment for CoMP of the present invention.
Figure 10 serves the flow chart of the 3rd embodiment for CoMP of the present invention.
Embodiment
To the problem that exists in the prior art, a kind of new interference coordination schemes is proposed among the present invention.
In the existing LTE system, PDCCH capable of using comes to UE transmission basic control information, like schedule information or authorization message etc.; After in the LTE-A system, introducing relaying, hope can further utilize PDCCH to come for relaying carries out resource allocation, but can there be certain problem in processing like this: in the LTE-A system; The base station can be sent information such as scheduling to grand UE, and relaying also can send information such as scheduling to R-UE, and relaying can not receive in transmit status; So; If when information was sent to relaying in the base station, relaying was in transmit status just, relaying then can not correctly receive the information from the base station so.Specifically, for a relaying, whether it can receive the transmission plan that PDCCH depends on return link from the base station; As shown in Figure 2, when return link uses the fake-MBSFN subframe to transmit, because relaying needs transmitting control channel information to give R-UE; Therefore; Relaying may be monitored less than the PDCCH from the base station, therefore, utilizes PDCCH will become infeasible for the thought of relay distribution resource.For this reason, introduce relaying Physical Downlink Control Channel (R-PDCCH) in the LTE-A system, be used for being effectively the relay distribution resource.
In addition, in practical application, can adopt semi-static or dynamic Resource Allocation Formula.On the resource that is a certain relay distribution; Control channel can comprise the L1/L2 control information; As mix automatic repeat requests (HAQR) and confirm/negative (ACK/NACK), CQI (CQI)/precoding matrix indicators (PMI) feedback (feedback), and scheduling and authorization message etc.These control informations can be carried out multiplexingly, as shown in Figure 3 with the passback data with Time Division Multiplexing or frequency division multiplexing (FDM) or TDM and FDM mode, Fig. 3 is for having the multiplex mode sketch map now; Perhaps, these control informations also can be carried out the combined coding modulation with the passback data attached on the passback data.
In the scheme according to the invention; Through in R-PDCCH, increasing certain control information; The combined coding modulation is carried out to the control information of the relaying that I-UE is caused interference in the schedule information and the base station that are about to I-UE, and in R-PDCCH, sends to relaying together, like this; Relaying can distribute the running time-frequency resource orthogonal time frequency resources of using with I-UE on the access link of self, thereby realizes interference coordination.
For making the object of the invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is done to specify further.
Fig. 4 is the flow chart of disturbance coordination method embodiment of the present invention.Suppose in the present embodiment that relaying and base station are the distributed scheduling relation, do not receive base stations control when promptly relaying is dispatched the R-UE under oneself controlling, the grand UE under the base stations control can be made interference coordination by other relaying under the base stations control simultaneously.As shown in Figure 4, may further comprise the steps:
Step 41:UE to base station feedback from as the I-UE of a certain relaying.
Before this step, UE need judge at first whether self is I-UE.In the present embodiment; Definition is positioned at (out of the relay coverage area) outside the relaying coverage; Promptly be positioned at the coverage of base station; And the UE at the edge (near the edge of the relay coverage area) of contiguous relaying coverage is I-UE; Concrete judgment mode is: UE confirms self to be within the coverage of base station, and receive from signal of base station intensity Pbs with receive from the difference of the signal strength signal intensity Prs of relaying greater than zero and less than predefined first threshold, then confirm from I-UE as this relaying.
Concrete feedback system can be decided according to the actual requirements, and main both sides consult, and can both discern to get final product, and follow-up analogue repeats no more.
Step 42: the base station increases the schedule information of I-UE in being directed against the R-PDCCH of this relaying, and R-PDCCH is sent to this relaying.
In the present embodiment, said schedule information can comprise: the running time-frequency resource that the sign of I-UE (ID) and I-UE use, as in certain subframe with the frequency resource of using (frequency subchannels) etc.
Wherein, the base station is carried out the combined coding modulation with schedule information and the base station of I-UE to the control information of this relaying.It is known in this field how to realize that combined coding is modulated to, and repeats no more.
Step 43: this relaying distributes the running time-frequency resource orthogonal time frequency resources of using with I-UE according to the schedule information that receives on the access link of self, to realize interference coordination.
In this step, the corresponding subframe (subframe that I-UE use) of relaying on the access link of self goes up distributes different frequency resources, with the frequency resource quadrature that guarantees to use with I-UE, thereby avoids interference.
Fig. 5 is the control channel sketch map under the disturbance coordination method according to the invention, and concrete condition is please with reference to embodiment illustrated in fig. 4.
For the up-downgoing access link, all can adopt processing mode shown in Figure 4.
In addition, introduced joint transmission (CoMP) service in the LTE-A system, usually, the UE that adopts the CoMP service has been called C-UE, the UE that does not adopt the CoMP service has been called common UE (N-UE).In practical application, can the combined coding modulation be carried out to the control information of relaying in schedule information and the base station of C-UE, in R-PDCCH, send to relaying together, like this, relaying can obtain the schedule information of C-UE; Simultaneously, the base station can sent to C-UE in the Physical Downlink Shared Channel (PDSCH) of data, and the ID of relaying is arranged in the destination address tabulation; Like this; Relaying both can obtain the schedule information of C-UE, can obtain the data message of C-UE again, thereby accomplished the CoMP service to C-UE with the base station.
Fig. 6 serves the flow chart of first embodiment for CoMP of the present invention.Suppose in the present embodiment that relaying and base station are the distributed scheduling relation, do not receive base stations control when promptly relaying is dispatched the R-UE under oneself controlling, the grand UE under the base stations control can be done the CoMP service by other relaying under the base stations control.As shown in Figure 6, may further comprise the steps:
Step 61:UE to base station feedback from as the C-UE of a relaying.
Before this step; UE need judge at first whether self is C-UE; In the present embodiment; Definition is positioned at (out of the relay coverage area) outside the relaying coverage, promptly is positioned at the coverage of base station, and the UE at the edge (near the edge of the relay coverage area) of contiguous relaying coverage is C-UE; Concrete judgment mode is: UE confirms self to be within the coverage of base station, and receive from signal of base station intensity with receive from the difference of the signal strength signal intensity of the relaying of C-UE feedback greater than zero and less than predefined second threshold value.Said second threshold value and before the concrete value of described first threshold can be decided according to the actual requirements.
Step 62: the base station increases the schedule information of C-UE in being directed against the R-PDCCH of this relaying, and R-PDCCH is sent to this relaying; Simultaneously, the base station increases the ID of this relaying when C-UE sends data message in the destination address tabulation.
In the present embodiment, said schedule information can comprise: the running time-frequency resource that C-UE ID, C-UE use, and relevant control information transmission, and like decode-regulating information (MSC) etc., so that relaying is to the processing such as correctly decode of the follow-up data that receive.
Wherein, the base station is carried out the combined coding modulation with schedule information and the base station of C-UE to the control information of relaying.It is known in this field how to realize that combined coding is modulated to, and repeats no more.
Step 63: this relaying carries out joint transmission according to the schedule information and the data message that receive to C-UE and base station.
For the up-downgoing access link, all can adopt processing mode shown in Figure 6.
Fig. 7 is the control channel sketch map under the CoMP service according to the invention, specifies please with reference to embodiment illustrated in fig. 6.
In addition, Fig. 6 introduction be the process that base station and relaying carry out CoMP service, in practical application, also can expand to a plurality of relayings are done the CoMP service to the UE in a certain relaying coverage situation.
Fig. 8 makes the sketch map of CoMP service to the UE in a certain relaying coverage for a plurality of relayings in the embodiment of the invention.As shown in Figure 8, for by the UE of main relaying (donor relay) RN1 service, if adjacent relaying RN2 can receive that UE sends to the data of RN1, and RN2 is under the situation of lower load, so the RN2 forwarding data that can help.The form of transmitting can be HARQ I, HARQ II or HARQ III class encoding scheme, perhaps utilizes Space-Time Block Coding (STBC) etc.This processing mode can be facilitated diversity, can effectively reduce switching (handover) time of relay well, and is particularly effective for the UE that is in high-speed moving state.This UE is called C-UE equally.
Suppose relay and base station are the distributed scheduling relation, do not receive base stations control when promptly relaying is dispatched the R-UE under oneself controlling, and the grand UE under the base stations control can be done the CoMP service by other relaying under the base stations control.
Fig. 9 serves the flow chart of second embodiment for CoMP of the present invention.As shown in Figure 9, may further comprise the steps:
Step 91:UE through main relaying to base station feedback from as the C-UE of a cooperating relay; Simultaneously, main relaying is to the schedule information of base station feedback C-UE.
In this step, the flow process that C-UE feeds back is: C-UE-＞main relaying-＞base station; Wherein, main relaying feeds back the schedule information of C-UE in relaying Physical Uplink Control Channel (R-PUCCH).
In addition, before this step, C-UE needs at first to confirm from the C-UE as a cooperating relay.In the present embodiment, definition is positioned at (within the donor relay coverage area) within the main relaying coverage and is C-UE near the UE of the edge zone (near the edge of coordinated relay coverage area) of the coverage of cooperating relay.Concrete definite mode is: UE confirms self to be in the coverage of main relaying; And the signal strength signal intensity of the next autonomous relaying that receives with receive from the difference of the signal strength signal intensity of cooperating relay greater than zero and less than predefined the 3rd threshold value, then confirm from as C-UE.The concrete value of the 3rd threshold value can be decided according to the actual requirements.
Step 92: the base station increases the schedule information of C-UE in the R-PDCCH of cooperating relay, and R-PDCCH is sent to cooperating relay.
The schedule information of said C-UE comprises: the running time-frequency resource that the sign of C-UE, C-UE use, and relevant control information transmission.
Step 93: cooperating relay is distributed the running time-frequency resource orthogonal time frequency resources of using with C-UE according to the schedule information that receives on the access link of self.
Step 94:C-UE sends data to main relaying.
Step 95: main relaying and cooperating relay receive the data from C-UE simultaneously.
Step 96: main relaying and cooperating relay are carried out encoding process, and upload data to the base station respectively.
In this step, main relaying and cooperating relay are carried out various encoding process, and upload data to the base station respectively through the relaying Physical Uplink Shared Channel (R-PUSCH) on the return link separately.
Step 97: joint-detection and reception are carried out in the base station.
Fig. 9 is used to explain the implementation procedure of up CoMP service, and following embodiment will be used to explain the implementation procedure of descending CoMP service.
Figure 10 serves the flow chart of the 3rd embodiment for CoMP of the present invention.Shown in figure 10, may further comprise the steps:
Step 101:UE through main relaying to base station feedback from as the C-UE of a cooperating relay; Simultaneously, main relaying is to the schedule information of base station feedback C-UE.
In this step, the flow process that C-UE feeds back is: C-UE-＞main relaying-＞base station; Wherein, main relaying feeds back the schedule information of C-UE in relaying Physical Uplink Control Channel (R-PUCCH).
In addition, before this step, C-UE needs at first to confirm from the C-UE as a cooperating relay.In the present embodiment, definition is positioned at (within the donor relay coverage area) within the main relaying coverage and is C-UE near the UE of the edge zone (near the edge of coordinated relay coverage area) of the coverage of cooperating relay.Concrete definite mode is: UE confirms self to be in the coverage of main relaying; And the signal strength signal intensity of the next autonomous relaying that receives with receive from the difference of the signal strength signal intensity of cooperating relay greater than zero and less than predefined the 3rd threshold value, then confirm from as C-UE.The concrete value of the 3rd threshold value can be decided according to the actual requirements.
Step 102: the base station increases the schedule information of C-UE in being directed against the R-PDCCH of cooperating relay, and R-PDCCH is sent to cooperating relay; Simultaneously, the base station increases the sign of cooperating relay when main relaying sends data in the destination address tabulation.
The schedule information of said C-UE comprises: the running time-frequency resource that the sign of C-UE, C-UE use, and coded message etc.Wherein, coded message is that the base station increases into, comprises precoding information such as (precoding), is used for relaying to the data that receive processing such as correctly decode.
Step 103: cooperating relay is obtained schedule information and data message, and C-UE and main relaying are carried out joint transmission.
In this step, main relaying and cooperating relay are carried out joint transmission according to certain coded system, thereby accomplish the CoMP service based on relaying, specifically are embodied as known in this fieldly, repeat no more.
Need to prove, embodiment illustrated in fig. 10 in, main relaying needs earlier the schedule information of C-UE is fed back to the base station; Then, give cooperating relay by base station feedback again, this has prolonged feedback time undoubtedly; Development along with technology; After the interface definition of relay well improved, relay well can directly communicate, thereby shortens feedback time greatly.
In addition; In traditional mode; R-PDCCH adopts the modulation system of quaternary PSK (QPSK) more, among each embodiment according to the invention, can replace high-order modulating; Like 16 quadrature amplitude modulation (QAM), 64QAM etc., serve the increase of the load of the control signaling on the R-PDCCH that is caused owing to interference coordination and CoMP with alleviation.
Based on said method, the present invention provides a kind of interference coordination system simultaneously, comprising:
I-UE is used for to base station feedback from the I-UE as a relaying;
The base station is used in the schedule information that increases I-UE to the R-PDCCH of relaying, and R-PDCCH is sent to relaying;
Relaying is used for according to the schedule information that receives, and on the access link of self, distributes the running time-frequency resource orthogonal time frequency resources of using with I-UE, realizes interference coordination.
In addition, this system also can further comprise:
C-UE is used for to base station feedback from the C-UE as a relaying;
The base station is further used for, and in the R-PDCCH of the relaying that feeds back to C-UE, increases the schedule information of C-UE, and R-PDCCH is sent to the relaying of C-UE feedback; Simultaneously, when C-UE sends data message, in the destination address tabulation, increase the sign of the relaying of C-UE feedback;
The relaying of C-UE feedback is used for according to the schedule information and the data message that receive C-UE and base station being carried out joint transmission.
And/or this system further comprises:
C-UE, be used for main relaying through self place to base station feedback from as the C-UE of a cooperating relay; Main relaying is used for the schedule information to base station feedback C-UE;
The base station is further used for, and in being directed against the R-PDCCH of cooperating relay, increases the schedule information of C-UE, and R-PDCCH is sent to cooperating relay; Cooperating relay is used for according to the schedule information that receives, and on the access link of self, distributes the running time-frequency resource orthogonal time frequency resources of using with C-UE;
C-UE is further used for, and sends data to main relaying; Main relaying and cooperating relay are further used for, and receive the data from C-UE simultaneously, and carry out encoding process, upload data to the base station respectively afterwards; The base station is further used for, and the data that main relaying and cooperating relay are uploaded are carried out joint-detection and reception.
And/or this system further comprises:
C-UE is used for through main relaying to base station feedback from as the C-UE of a cooperating relay; Main relaying is used for the schedule information to base station feedback C-UE;
The base station is further used for, and in being directed against the R-PDCCH of cooperating relay, increases the schedule information of C-UE, and R-PDCCH is sent to said cooperating relay; Simultaneously, the base station increases the sign of cooperating relay when main relaying sends data in the destination address tabulation;
Cooperating relay is used to obtain schedule information and data message, and C-UE and main relaying are carried out joint transmission.
Need to prove that in practical application, above-mentioned I-UE and C-UE might be repetitions, promptly a UE possibly both carry out interference coordination, carried out the CoMP service again.
In a word, adopt technical scheme of the present invention, utilize R-PDCCH to carry the schedule information of I-UE, and send to the relaying that this I-UE is caused interference; Like this, this relaying can distribute the running time-frequency resource orthogonal time frequency resources of using with I-UE according to the schedule information that receives on the access link of self, thereby realizes interference coordination.In addition, scheme according to the invention also can realize the CoMP service through in R-PDCCH, increasing the schedule information of C-UE, thereby has enlarged the range of application of scheme according to the invention.
In sum, more than being merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (18)
1. a disturbance coordination method is characterized in that, this method comprises:
Terminal UE to base station feedback from as the interfered with terminal I-UE of a relaying;
Said base station increases the schedule information of said I-UE in being directed against the relaying Physical Downlink Control Channel R-PDCCH of said relaying, and said R-PDCCH is sent to said relaying;
Said relaying distributes the running time-frequency resource orthogonal time frequency resources of using with said I-UE according to the schedule information that receives on the access link of self, realize interference coordination.
2. method according to claim 1 is characterized in that, said UE, further comprised before the I-UE as a relaying to base station feedback: UE confirms to comprise from the I-UE as a relaying:
UE confirms self to be within the coverage of said base station; And receive from said signal of base station intensity with receive from the difference of the signal strength signal intensity of said relaying greater than zero and less than predefined first threshold, then confirm from I-UE as said relaying.
3. method according to claim 1 is characterized in that, the schedule information of said I-UE comprises: the running time-frequency resource that the sign of said I-UE and said I-UE use;
Said relaying is known the running time-frequency resource that said I-UE uses according to said schedule information.
4. method according to claim 1 is characterized in that, said base station is comprising to the schedule information that increases said I-UE among the R-PDCCH of said relaying:
Said base station is carried out the combined coding modulation with schedule information and the said base station of said I-UE to the control information of said relaying.
5. method according to claim 1 is characterized in that, this method further comprises:
UE to base station feedback from as the associating terminal C-UE of a relaying;
Said base station increases the schedule information of said C-UE in the R-PDCCH of the relaying that feeds back to said C-UE, and said R-PDCCH is sent to the relaying of said C-UE feedback; Simultaneously, said base station increases the sign of the relaying of said C-UE feedback when said C-UE sends data in the destination address tabulation;
The relaying of said C-UE feedback carries out joint transmission according to the schedule information and the data message that receive to said C-UE and base station.
6. method according to claim 5 is characterized in that, said UE, further comprised before the C-UE as a relaying to base station feedback: UE confirms to comprise from the C-UE as a relaying:
UE confirms self to be within the coverage of said base station; And receive from said signal of base station intensity with receive from the difference of the signal strength signal intensity of the relaying of said C-UE feedback greater than zero and less than predefined second threshold value, then confirm from C-UE as said relaying.
7. method according to claim 5 is characterized in that, the schedule information of said C-UE comprises: the running time-frequency resource that the sign of said C-UE, said C-UE use, and control information transmission.
8. method according to claim 5 is characterized in that, said base station increases said C-UE in the R-PDCCH of the relaying that feeds back to said C-UE schedule information comprises:
Said base station is carried out the combined coding modulation with schedule information and the said base station of said C-UE to the control information of the relaying of said C-UE feedback.
9. method according to claim 1 is characterized in that, this method further comprises:
UE through main relaying to base station feedback from as the C-UE of a cooperating relay; Simultaneously, said main relaying is to the schedule information of the said C-UE of said base station feedback;
Said base station increases the schedule information of said C-UE in being directed against the R-PDCCH of said cooperating relay, and said R-PDCCH is sent to said cooperating relay;
Said cooperating relay is distributed the running time-frequency resource orthogonal time frequency resources of using with said C-UE according to the schedule information that receives on the access link of self;
Said C-UE sends data to said main relaying;
Said main relaying and said cooperating relay receive the data from said C-UE simultaneously;
Said main relaying and said cooperating relay are carried out encoding process, and upload data to said base station respectively;
Joint-detection and reception are carried out in said base station.
10. method according to claim 9 is characterized in that, the schedule information of said C-UE comprises: the running time-frequency resource that the sign of said C-UE, said C-UE use, and control information transmission.
11. method according to claim 1 is characterized in that, this method further comprises:
UE through main relaying to base station feedback from as the C-UE of a cooperating relay; Simultaneously, said main relaying is to the schedule information of the said C-UE of said base station feedback;
Said base station increases the schedule information of said C-UE in being directed against the R-PDCCH of said cooperating relay, and said R-PDCCH is sent to said cooperating relay;
Simultaneously, said base station increases the sign of said cooperating relay when said main relaying sends data in the destination address tabulation;
Said cooperating relay is obtained said schedule information and data message, and said C-UE and said main relaying are carried out joint transmission.
12. method according to claim 11 is characterized in that, the schedule information of said C-UE comprises: the running time-frequency resource that the sign of said C-UE, said C-UE use, and coded message.
13., it is characterized in that said UE, further comprised through main relaying according to claim 9 or 11 described methods before oneself C-UE as a cooperating relay of base station feedback: said UE confirms to comprise from the C-UE as a cooperating relay:
Said UE confirms self to be in the coverage of a main relaying; And receive from the signal strength signal intensity of said main relaying with receive from the difference of the signal strength signal intensity of said cooperating relay greater than zero and less than predefined the 3rd threshold value, then confirm from C-UE as said cooperating relay.
14., it is characterized in that said R-PDCCH adopts high-order modulating according to claim 1,5,9 or 11 described methods.
15. an interference coordination system is characterized in that, this system comprises:
Interfered with terminal I-UE is used for to base station feedback from the I-UE as a relaying;
Said base station is used in the schedule information that increases said I-UE to the relaying Physical Downlink Control Channel R-PDCCH of said relaying, and said R-PDCCH is sent to said relaying;
Said relaying is used for according to the schedule information that receives, and on the access link of self, distributes the running time-frequency resource orthogonal time frequency resources of using with said I-UE, realizes interference coordination.
16. system according to claim 15 is characterized in that, this system further comprises:
Associating terminal C-UE is used for to base station feedback from the C-UE as a relaying;
Said base station is further used for, and in the R-PDCCH of the relaying that feeds back to said C-UE, increases the schedule information of said C-UE, and said R-PDCCH is sent to the relaying of said C-UE feedback; Simultaneously, when said C-UE sends data message, in the destination address tabulation, increase the sign of the relaying of said C-UE feedback;
The relaying of said C-UE feedback is used for according to the schedule information and the data message that receive said C-UE and said base station being carried out joint transmission.
17. system according to claim 15 is characterized in that, this system further comprises:
C-UE, be used for main relaying through self place to said base station feedback from as the C-UE of a cooperating relay;
Said main relaying is used for the schedule information to the said C-UE of said base station feedback;
Said base station is further used for, and in being directed against the R-PDCCH of said cooperating relay, increases the schedule information of said C-UE, and said R-PDCCH is sent to said cooperating relay;
Said cooperating relay is used for according to the schedule information that receives, and on the access link of self, distributes the running time-frequency resource orthogonal time frequency resources of using with said C-UE;
Said C-UE is further used for, and sends data to said main relaying;
Said main relaying and said cooperating relay are further used for, and receive the data from said C-UE simultaneously, and carry out encoding process, upload data to said base station respectively afterwards;
Said base station is further used for, and the data that said main relaying and cooperating relay are uploaded are carried out joint-detection and reception.
18. system according to claim 15 is characterized in that, this system further comprises:
C-UE is used for through main relaying to base station feedback from as the C-UE of a cooperating relay;
Said main relaying is used for the schedule information to the said C-UE of said base station feedback;
Said base station is further used for, and in being directed against the R-PDCCH of said cooperating relay, increases the schedule information of said C-UE, and said R-PDCCH is sent to said cooperating relay; Simultaneously, said base station increases the sign of said cooperating relay when said main relaying sends data in the destination address tabulation;
Said cooperating relay is used to obtain said schedule information and data message, and said C-UE and said main relaying are carried out joint transmission.
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| CN102917457B (en) * | 2011-08-05 | 2016-06-08 | 华为技术有限公司 | Transmission strengthens the method for schedule information, base station and subscriber equipment |
| CN102932092B (en) * | 2011-08-09 | 2017-07-11 | 中兴通讯股份有限公司 | The method of reseptance of the control information based on multipoint cooperative, apparatus and system |
| CN102932044B (en) * | 2011-08-11 | 2016-07-06 | 上海交通大学 | Multiuser cooperative transmission, subscriber equipment and base station |
| EP2900012B1 (en) * | 2012-10-09 | 2016-09-28 | Huawei Technologies Co., Ltd. | Interference coordination method and device |
| CN109803406B (en) * | 2017-11-17 | 2023-07-18 | 华为技术有限公司 | Indication method of time domain resource in relay network, network equipment and user equipment |
| CN110351011B (en) * | 2018-04-04 | 2022-02-18 | 华为技术有限公司 | Resource allocation method, related device and system |
| JP2021193761A (en) * | 2018-09-27 | 2021-12-23 | ソニーグループ株式会社 | Communication device |
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