CN104735789A

CN104735789A - Inter-cell interference elimination method, device and system

Info

Publication number: CN104735789A
Application number: CN201310705995.7A
Authority: CN
Inventors: 王森; 韩双锋
Original assignee: China Mobile Communications Group Co Ltd
Current assignee: China Mobile Communications Group Co Ltd
Priority date: 2013-12-19
Filing date: 2013-12-19
Publication date: 2015-06-24
Anticipated expiration: 2033-12-19
Also published as: CN104735789B

Abstract

The invention discloses an inter-cell interference elimination method, device and system. The method includes the steps that a first base station sends a downlink reference signal, so a second base station can perform channel estimation according to the signal and obtain corresponding channel information; the channel information fed back by the second base station is received, dispatching resources are distributed to download dispatched users according to the channel information, and data are sent to the download dispatched users according to the dispatching resources, and the channel information comprises channel information between sending antennas of the first base station and receiving antennas of the second base station. In the scheme, a channel between the receiving antennas of one base station and the sending antennas of the adjacent base station can be measured and fed back to the adjacent base station in the process of conducting downlink channel estimation, so influences of downlink sending of one cell and influences of downlink sending on uplink receiving of the corresponding cell can be comprehensively considered when adjacent base stations distribute downlink dispatching resources; accordingly, the purpose of eliminating inter-cell interference can be achieved, and system performance is improved.

Description

A kind of inter-cell interference cancellation method, Apparatus and system

Technical field

The present invention relates to wireless communication technology field, particularly relate to a kind of based on while co-channel full duplex (CCFD, Co-frequency Co-time Full Duplex) wireless communication system inter-cell interference cancellation method, Apparatus and system.

Background technology

At present, according to the difference of way communication, wireless communication system mainly can be divided into time division duplex (TDD, Time Division Duplex) system and the large class of Frequency Division Duplexing (FDD) (FDD, Frequency DivisionDuplex) system two.Wherein, described tdd systems can use same frequency, different time-gap to transmit data, and described frequency division duplex system can use identical time slot, different frequency to transmit data, to reach the object of the interference between isolation uplink downlink respectively.But, due in above-mentioned two kinds of duplex systems, in the process of isolation uplink downlink, sacrifice time resource and frequency resource respectively, thus can there is the comparatively low problem of the availability of frequency spectrum.

For the problems referred to above, industry proposes a kind of can be used for and improves co-channel full duplex communication system while frequency spectrum resource utilization rate.Described while in co-channel full duplex communication system, communicating pair can be configured with a pair transmitting antenna and reception antenna respectively, to reach the object of carrying out the transmission of downlink data and the reception of upstream data on same frequency and time quantum simultaneously.Particularly, under ideal conditions, the while of described, co-channel full duplex communication system is compared with frequency division duplex system with existing tdd systems, has the lifting of twice left and right spectrum efficiency.

But, as shown in Figure 1 (Fig. 1 is the interference signal schematic diagram simultaneously between co-channel full duplex communication system), due in co-channel full duplex communication system described while, interference (supposing can accomplish good isolation between base station end dual-mode antenna) between system sends the interference that causes adjacent base station downlink reception user and user uplink send except the interference that causes adjacent base station uplink receiving except comprising base station down, also can comprise the interference etc. that base station down transmitting antenna causes adjacent base station uplink receiving antenna, and, the self-interference problem of inside of base station while of provide only in prior art for solving in co-channel full duplex communication system or the scheme for solving the up-downgoing interference problem in same community between base station and user, therefore, if still adopt inter-cell interference cancellation scheme described in the prior art to carry out the elimination of presence of intercell interference to co-channel full duplex communication system while of described, interference eradicating efficacy can be there is poor, cause the problem that system communication performance reduces.

Summary of the invention

Embodiments provide a kind of inter-cell interference cancellation method, Apparatus and system, with solve exist at present while the inter-cell interference cancellation effect of co-channel full duplex communication system is poor causes the problem that system communication performance is lower.

Embodiments provide a kind of inter-cell interference cancellation method, the while that described method being applicable in co-channel full duplex communication system, comprising:

First base station sends downlink reference signal, carries out channel estimating and obtain corresponding channel information to make the second base station adjacent to described first base station according to described downlink reference signal;

Receive the described channel information of described second base station feedback, and be that descending scheduling user distributes corresponding scheduling resource according to described channel information, and, pass through distributed scheduling resource carries out data transmission to described descending scheduling user, wherein, described channel information comprises the channel information between the transmitting antenna of described first base station and the reception antenna of described second base station.

Wherein, described downlink reference signal is orthogonal with the uplink reference signals of the uplink reference signals of each Serving cell of described first base station and each Serving cell of described second base station respectively; Or,

In the resource that described downlink reference signal uses, each Serving cell of described first base station and each Serving cell of described second base station adopt the mode of mourning in silence to carry out the transmission of upstream data.

Further, when not being provided with the interference cancellation circuit for eliminating the interference signal between the transmitting antenna of described first base station and the reception antenna of described first base station in described first base station, the signal in orthogonal for carrying out self-interference channel measurement that described downlink reference signal also sends with described first base station.

Further, described method also comprises:

If according to the described channel information of described second base station feedback, determine that the interference channel power between described first base station and described second base station is greater than setting threshold, be then that described second base station assigns dedicated channel measures resource, and measure transmission resource being carried out described downlink reference signal in described dedicated channel.

Wherein, measure in resource in described dedicated channel, the transmission of upward signal and downstream signal is not carried out in each Serving cell of described first base station and each Serving cell of described second base station.

Further, passing through before distributed scheduling resource carries out the transmission of data to described descending scheduling user, described method also comprises:

According to the described channel information of described second base station feedback, precoding is carried out to the data of described descending scheduling user;

Pass through the transmission that distributed scheduling resource carries out data to described descending scheduling user, comprising:

Pass through distributed scheduling resource, the descending scheduling user data after precoding is sent.

The embodiment of the present invention additionally provides a kind of inter-cell interference cancellation method, the while that described method being applicable in co-channel full duplex communication system, comprising:

Second base station receives the downlink reference signal that first base station adjacent with described second base station sends, and carry out channel estimating to obtain corresponding channel information according to described downlink reference signal, wherein, accessed channel information comprises the channel information between the transmitting antenna of described first base station and the reception antenna of described second base station;

Give described first base station by the described feedback of channel information got, with make described first base station according to described in the channel information that gets distribute corresponding scheduling resource for descending scheduling user and pass through distributed scheduling resource to carry out data transmission to described descending scheduling user.

Further, described method also comprises:

If according to the described channel information got, determine that the interference channel power between described first base station and described second base station is greater than setting threshold, then indicate described first base station to be that described second base station assigns dedicated channel is measured resource and measures transmission resource being carried out described downlink reference signal in described dedicated channel.

Further, described first base station is given by the described feedback of channel information got, with make described first base station according to described in the channel information that gets distribute corresponding scheduling resource for descending scheduling user and pass through the transmission that distributed scheduling resource carries out data to described descending scheduling user, comprising:

Described first base station is given by the described feedback of channel information got, with make described first base station according to described in the channel information that gets distribute corresponding scheduling resource for descending scheduling user, and precoding is carried out to the data of described descending scheduling user, and, pass through distributed scheduling resource, the descending scheduling user data after precoding is sent.

Correspondingly, embodiments provide a kind of base station, the while that described base station being applicable in co-channel full duplex communication system, comprising:

Reference signal transmitting element, for sending downlink reference signal, carrying out channel estimating to make the adjacent base station of described base station according to described downlink reference signal and obtaining corresponding channel information;

Channel information receiving element, for receiving the described channel information of described adjacent base station feedback;

Downlink data transmitting element, described channel information for receiving according to described channel information receiving element is that descending scheduling user distributes corresponding scheduling resource, and pass through distributed scheduling resource carries out data transmission to described descending scheduling user, wherein, described channel information comprises the channel information between the transmitting antenna of described base station and the reception antenna of described adjacent base station.

Wherein, described downlink reference signal is orthogonal with the uplink reference signals of the uplink reference signals of each Serving cell of described base station and each Serving cell of described adjacent base station respectively; Or,

In the resource that described downlink reference signal uses, each Serving cell of described base station and each Serving cell of described adjacent base station adopt the mode of mourning in silence to carry out the transmission of upstream data.

Further, when not being provided with the interference cancellation circuit for eliminating the interference signal between the transmitting antenna of described base station and the reception antenna of described base station in described base station, the signal in orthogonal for carrying out self-interference channel measurement that described downlink reference signal also sends with described base station.

Further, described base station also comprises private resource allocation units:

Described private resource allocation units, if the described channel information for feeding back according to described adjacent base station, determine that the interference channel power between described base station and described adjacent base station is greater than setting threshold, be then that described adjacent base station assigned with dedicated channel measures resource;

Described reference signal transmitting element, specifically for measuring transmission resource being carried out described downlink reference signal in described dedicated channel.

Wherein, measure in resource in described dedicated channel, the transmission of upward signal and downstream signal is not carried out in each Serving cell of described base station and each Serving cell of described adjacent base station.

Further, described base station also comprises data precoding unit:

Described data precoding unit, for passing through before distributed scheduling resource carries out the transmission of data to described descending scheduling user, according to the described channel information that described adjacent base station feeds back, to carry out precoding to the data of described descending scheduling user;

Described downlink data transmitting element, specifically for passing through distributed scheduling resource, sends the descending scheduling user data after precoding.

The embodiment of the present invention additionally provides a kind of base station, the while that described base station being applicable in co-channel full duplex communication system, comprising:

Reference signal receiving element, the downlink reference signal that the adjacent base station for receiving described base station sends;

Channel information acquisition unit, described downlink reference signal for receiving according to described reference signal receiving element carries out channel estimating to obtain corresponding channel information, wherein, accessed channel information comprises the channel information between the transmitting antenna of described adjacent base station and the reception antenna at described station;

Feedback of channel information unit, for giving described adjacent base station by the described feedback of channel information got, with make described adjacent base station according to described in the channel information that gets distribute corresponding scheduling resource for descending scheduling user and pass through distributed scheduling resource to carry out data transmission to described descending scheduling user.

Wherein, described downlink reference signal is orthogonal with the uplink reference signals of the uplink reference signals of each Serving cell of described adjacent base station and each Serving cell of described base station respectively; Or,

In the resource that described downlink reference signal uses, each Serving cell of described adjacent base station and each Serving cell of described base station adopt the mode of mourning in silence to carry out the transmission of upstream data.

Further, when not being provided with the interference cancellation circuit for eliminating the interference signal between the transmitting antenna of described adjacent base station and the reception antenna of described adjacent base station in described adjacent base station, the signal in orthogonal for carrying out self-interference channel measurement that described downlink reference signal also sends with described adjacent base station.

Further, described base station also comprises private resource indicating member:

Described private resource indicating member, if for according to the described channel information got, determine that the interference channel power between described adjacent base station and described base station is greater than setting threshold, then indicate described adjacent base station to be that described base station assigns dedicated channel is measured resource and measures transmission resource being carried out described downlink reference signal in described dedicated channel.

Wherein, measure in resource in described dedicated channel, the transmission of upward signal and downstream signal is not carried out in each Serving cell of described adjacent base station and each Serving cell of described base station.

Further, described feedback of channel information unit, specifically for giving described adjacent base station by the described feedback of channel information got, with make described adjacent base station according to described in the channel information that gets distribute corresponding scheduling resource for descending scheduling user, and precoding is carried out to the data of described descending scheduling user, and, pass through distributed scheduling resource, the descending scheduling user data after precoding is sent.

Correspondingly, the embodiment of the present invention additionally provides a kind of inter-cell interference cancellation system, the while that described system being applicable in co-channel full duplex communication system, comprises at least one first base station and at least one the second base station, wherein:

Described first base station, for sending downlink reference signal, and receive the channel information of described second base station feedback, and, be that descending scheduling user distributes corresponding scheduling resource according to described channel information, and pass through distributed scheduling resource carries out data transmission to described descending scheduling user, wherein, described channel information comprises the channel information between the transmitting antenna of described first base station and the reception antenna of described second base station;

Described second base station, for receiving the downlink reference signal that described first base station sends, and carries out channel estimating to obtain corresponding channel information according to described downlink reference signal, and, give described first base station by accessed feedback of channel information.

Beneficial effect of the present invention is as follows:

Embodiments provide a kind of inter-cell interference cancellation method, Apparatus and system, described method comprises: the first base station sends downlink reference signal, carries out channel estimating and obtain corresponding channel information to make the second adjacent base station according to described downlink reference signal; Receive the described channel information of described second base station feedback, and be descending scheduling user allocation schedule resource according to described channel information, and, pass through distributed scheduling resource carries out data transmission to descending scheduling user, wherein, accessed channel information comprises the channel information between the transmitting antenna of the first base station and the reception antenna of the second base station.In technical scheme described in the embodiment of the present invention, due to when carrying out the estimation of down channel, can measure the channel between base station receive antenna and adjacent base station transmitting antenna and feed back to adjacent base station, to make adjacent base station when carrying out the distribution of descending scheduling resource, can consider this cell downlink send and descending transmission on the impact of neighbor cell uplink receiving, thus the object eliminated largely and disturb between co-channel full duplex communication system cell simultaneously can be reached, promote the systematic function of co-channel full duplex communication system simultaneously.

Accompanying drawing explanation

In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly introduced, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

Figure 1 shows that the interference signal schematic diagram simultaneously between co-channel full duplex communication system;

Figure 2 shows that the schematic flow sheet of inter-cell interference cancellation method described in the embodiment of the present invention one;

Figure 3 shows that the schematic flow sheet of inter-cell interference cancellation method described in the embodiment of the present invention two;

Figure 4 shows that the schematic flow sheet of inter-cell interference cancellation method described in the embodiment of the present invention three;

Figure 5 shows that the structural representation of base station described in the embodiment of the present invention four;

Figure 6 shows that the structural representation of base station described in the embodiment of the present invention five;

Figure 7 shows that the structural representation of inter-cell interference cancellation system described in the embodiment of the present invention six.

Embodiment

In order to make the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the present invention is described in further detail, and obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.

Embodiment one:

As shown in Figure 2, it is the schematic flow sheet of inter-cell interference cancellation method described in the embodiment of the present invention one, the while that described inter-cell interference cancellation method being applicable in co-channel full duplex communication system.Particularly, described inter-cell interference cancellation method can comprise the following steps:

Step 101: the first base station sends downlink reference signal, carry out channel estimating to make the second base station adjacent to described first base station according to described downlink reference signal and obtain corresponding channel information, wherein, accessed channel information comprises the channel information between the transmitting antenna of described first base station and the reception antenna of described second base station.

Particularly, at the same time in co-channel full duplex communication system, channel information between the transmitting antenna of described first base station and the reception antenna of described second base station at least can be relevant with interference signal between the transmitting antenna of described first base station and the reception antenna of described second base station, and the embodiment of the present invention is not limited in any way this.

It should be noted that; in embodiment of the present invention; the channel information of described second base station accessed by described downlink reference signal is except can comprising the channel information between the transmitting antenna of described first base station and the reception antenna of described second base station; usually the channel information between base station and user can also be comprised; as as described in the first base station and as described in channel information etc. between user in second each community, base station, the embodiment of the present invention is not also limited in any way this.

It should be noted that again, the channel information of described second base station accessed by described downlink reference signal usually can for the CQI(Channel Quality Indication for weighing channel quality, channel quality indicates) information such as parameter, the embodiment of the present invention is not also limited in any way this.

Further, in embodiment of the present invention, in order to improve the accuracy of channel information measurement, described first base station, when sending described downlink reference signal, can carry out processing to make it meet the following conditions accordingly to described downlink reference signal:

Described downlink reference signal is orthogonal with the uplink reference signals of the uplink reference signals of each Serving cell of described first base station and each Serving cell of described second base station respectively, wherein, carrying out orthogonal resource can be time domain, frequency domain or code channel etc., and the embodiment of the present invention is not limited in any way this; Or,

In the resource that described downlink reference signal uses, each Serving cell of described first base station and each Serving cell of described second base station adopt the mode of mourn in silence (Mute) to carry out the transmission of upstream data, wherein, the resource that described downlink reference signal uses can by master controller, as unified each base stations be handed down in system such as base station controllers (BSC), the embodiment of the present invention does not repeat this.

Further, due to for while co-channel full duplex communication system in each base station, the measurement of the self-interference channel between transmitting antenna to reception antenna needs the adjustment of transmitted power, because excessive transmitted power can make receiving circuit saturated, cause base station normally to work, therefore, the reference signal measured for interference channel between base station can not be used as the measurement of self-interference channel.That is, when not being provided with interference cancellation circuit (namely cannot accomplish good isolation between base station end dual-mode antenna) for eliminating the interference signal between the transmitting antenna of described first base station and the reception antenna of described first base station in described first base station, it is also orthogonal for the signal carrying out self-interference channel measurement that described downlink reference signal and described first base station send, to ensure the accuracy of channel information measurement.

Step 102: the channel information receiving described second base station feedback, and be that descending scheduling user distributes corresponding scheduling resource according to the channel information of described second base station feedback, and, pass through distributed scheduling resource carries out data transmission to described descending scheduling user.

Wherein, the channel information that described second base station is fed back is the channel information of channel information when channel estimating is carried out according to described downlink reference signal in described second base station between transmitting antenna that is accessed, that include described first base station and the reception antenna of described second base station, and the embodiment of the present invention does not repeat this.

Further, be that descending scheduling user distributes corresponding scheduling resource according to the channel information of described second base station feedback, usually can be the channel information according to described second base station feedback, determine available, the scheduling resource relatively little to described second base station interference, and from described available, corresponding scheduling resource is selected to distribute to described descending scheduling user in the scheduling resource relatively little to described second base station interference, to reach the object reduced the interference of the user of each community of the second base station receive antenna or the second base station, improve the effect of inter-cell interference cancellation.

Further, in embodiment of the present invention, passing through before distributed scheduling resource carries out the transmission of data to described descending scheduling user, described method can also comprise:

According to the channel information that described second base station is fed back, precoding is carried out to the data of described descending scheduling user.Particularly, in embodiment of the present invention, can adopt and precoding processing is carried out to the data of Beamforming algorithm to described descending scheduling user of adjacent base station formation " zero falls into ", afterwards, pass through distributed scheduling resource again, descending scheduling user data after precoding is sent, to reach while guarantee downlink traffic transmission, reduces the object of this community to the interference of neighbor cell uplink user.

Further, in order to improve the accuracy of channel information measurement result further, in embodiment of the present invention, described method can also comprise:

According to the channel information that described second base station is fed back, determine whether the interference channel power between described first base station and described second base station is greater than setting threshold, if, be then that described second base station assigns dedicated channel measures resource, and measure transmission resource being carried out described downlink reference signal in described dedicated channel.

Particularly, in embodiment of the present invention, according to the average power of the adjacent base station interference channel recorded in setting duration, each base station (the first base station or the second base station) can judge whether the downlink transfer of adjacent base station causes severe jamming to the uplink receiving of self, if find, adjacent base station causes severe jamming (average power as the adjacent base station interference channel recorded in setting duration is greater than setting threshold) to this base station, assigned with dedicated channel then can be adopted to measure resource and (to comprise time domain, the resource such as frequency domain or code channel), and carry out more accurate channel estimating by the mode that described dedicated channel measures the transmission or reception that resource carries out downlink reference signal, the accuracy of channel information measurement result is improved with this.

Further, in embodiment of the present invention, measure in resource in described dedicated channel, each Serving cell of described first base station and each Serving cell of described second base station do not carry out the transmission of upward signal and downstream signal usually, improve the accuracy of channel information measurement result with this.

It should be noted that in addition, because channel measurement resource is not changeless, but can change along with the change of channel conditions between base station, therefore, in embodiment of the present invention, the dedicated channel of distributing for each base station measures resource also to be needed the change according to channel conditions between base station and correspondingly adjusts change, and the embodiment of the present invention does not repeat this.

It should be noted that again, in embodiment of the present invention, between base station, dedicated channel is measured in resource, the channel information obtained by downlink reference signal is by X2 interface, wireless Backhaul or feed back to master controller by base station optical fiber etc. separately, afterwards, again by the unified distribution carrying out channel information of master controller, the embodiment of the present invention does not also repeat this.

The embodiment of the present invention one provides a kind of inter-cell interference cancellation method being applicable to co-channel full duplex communication system simultaneously, due to when carrying out the transmission of data to descending scheduling user, can receiving neighbor bs feedback base station transmitting antenna and adjacent base station reception antenna between channel information, and the distribution of descending scheduling resource is carried out according to described channel information, can consider this cell downlink send and descending transmission on the impact of neighbor cell uplink receiving, thus the object eliminated largely and disturb between co-channel full duplex communication system cell simultaneously can be reached, promote the systematic function of co-channel full duplex communication system simultaneously.

Embodiment two:

The embodiment of the present invention two is the second base station for action executing side, is further described inter-cell interference cancellation method described in the embodiment of the present invention one.As shown in Figure 3, it can comprise the following steps for the schematic flow sheet of inter-cell interference cancellation method described in the embodiment of the present invention two, described inter-cell interference cancellation method:

Step 201: the second base station receives the downlink reference signal that first base station adjacent with described second base station sends, and carry out channel estimating to obtain corresponding channel information according to described downlink reference signal, wherein, accessed channel information comprises the channel information between the transmitting antenna of described first base station and the reception antenna of described second base station.

Particularly, at the same time in co-channel full duplex communication system, channel information between the dual-mode antenna of described first base station and the dual-mode antenna of described second base station at least can be relevant with interference signal between the transmitting antenna of described first base station and the reception antenna of described second base station, and the embodiment of the present invention is not limited in any way this.

It should be noted that; in embodiment of the present invention; channel information accessed when channel estimating is carried out according to described downlink reference signal in described second base station is except can comprising the channel information between the transmitting antenna of described first base station and the reception antenna of described second base station; usually the channel information between base station and user can also be comprised; as as described in the first base station and as described in channel information etc. between user in second each community, base station, the embodiment of the present invention is not also limited in any way this.

It should be noted that, the channel information of described second base station accessed by described downlink reference signal can be the information such as the CQI parameter for weighing channel quality usually, and the embodiment of the present invention is not also limited in any way this again.

Further, in embodiment of the present invention, in order to improve the accuracy of channel information measurement, described downlink reference signal need meet the following conditions usually:

In the resource that described downlink reference signal uses, each Serving cell of described first base station and each Serving cell of described second base station adopt the mode of mourning in silence to carry out the transmission of upstream data, wherein, the resource that described downlink reference signal uses can by master controller, as unified each base stations be handed down in system such as base station controllers, the embodiment of the present invention does not repeat this.

Step 202: give described first base station by the described feedback of channel information got, with make described first base station according to described in the channel information that gets distribute corresponding scheduling resource for descending scheduling user and pass through distributed scheduling resource to carry out data transmission to described descending scheduling user.

Particularly, in embodiment of the present invention, described first base station according to the channel information of described second base station feedback be descending scheduling user distribute corresponding scheduling resource time, usually can according to the channel information of described second base station feedback, determine available, the scheduling resource relatively little to described second base station interference, and from described available, corresponding scheduling resource is selected to distribute to described descending scheduling user in the scheduling resource relatively little to described second base station interference, to reach the interference reduced the user of each community of the second base station receive antenna or the second base station, and then the object of the effect of raising inter-cell interference cancellation.

Further, described first base station is given by the described feedback of channel information got, with make described first base station according to described in the channel information that gets distribute corresponding scheduling resource for descending scheduling user and pass through the transmission that distributed scheduling resource carries out data to described descending scheduling user, can comprise:

Particularly, in embodiment of the present invention, can adopt and precoding processing is carried out to the data of Beamforming algorithm to described descending scheduling user of adjacent base station formation " zero falls into ", to reach while guarantee downlink traffic transmission, reduce the object of this community to the interference of neighbor cell uplink user.

Further, in embodiment of the present invention, described method can also comprise:

If according to channel information accessed when carrying out channel estimating, determine that the interference channel power between described first base station and described second base station is greater than setting threshold, then indicate described first base station to be that described second base station assigns dedicated channel is measured resource and measures transmission resource being carried out described downlink reference signal in described dedicated channel.

Wherein, measure in resource in described dedicated channel, each Serving cell of described first base station and each Serving cell of described second base station do not carry out the transmission of upward signal and downstream signal usually, improve the accuracy of channel information measurement result with this.

The embodiment of the present invention two provides a kind of inter-cell interference cancellation method being applicable to co-channel full duplex communication system simultaneously, due to when carrying out the channel estimating of down channel, can measure the channel between base station receive antenna and adjacent base station transmitting antenna and feed back to adjacent base station, to make adjacent base station when carrying out the distribution of descending scheduling resource, can consider this cell downlink send and descending transmission on the impact of neighbor cell uplink receiving, thus the object eliminated largely and disturb between co-channel full duplex communication system cell simultaneously can be reached, promote the systematic function of co-channel full duplex communication system simultaneously.

Embodiment three:

The embodiment of the present invention three is the first mutual base station and the second base station both sides for action executing side, is further described inter-cell interference cancellation method described in the embodiment of the present invention one or embodiment two.As shown in Figure 4, it can comprise the following steps for the schematic flow sheet of inter-cell interference cancellation method described in the embodiment of the present invention three, described inter-cell interference cancellation method:

Step 301: the first base station sends downlink reference signal.

Particularly, in embodiment of the present invention, in order to improve the accuracy of channel information measurement, described first base station, when sending described downlink reference signal, can carry out processing to make it meet the following conditions accordingly to described downlink reference signal:

Step 302: the second base station receives the downlink reference signal that described first base station sends, and carry out channel estimating to obtain corresponding channel information according to described downlink reference signal, wherein, accessed channel information comprises the channel information between the transmitting antenna of described first base station and the reception antenna of described second base station.

Step 303: the described feedback of channel information got is given described first base station by the second base station.

Particularly, the described channel information got can directly be fed back to described first base station by described second base station, also the channel information by getting described in sending to described master controller, and the mode of being undertaken by described master controller distributing unitedly is to the channel information got described in described first base station feedback, example of the present invention is not limited in any way this.

Step 304: the first base station receives the channel information of described second base station feedback, and be that descending scheduling user distributes corresponding scheduling resource according to the channel information of described second base station feedback, and, pass through distributed scheduling resource carries out data transmission to described descending scheduling user.

The embodiment of the present invention three provides a kind of inter-cell interference cancellation method being applicable to co-channel full duplex communication system simultaneously, due to when carrying out the transmission of data to descending scheduling user, can receiving neighbor bs feedback base station transmitting antenna and adjacent base station reception antenna between channel information, and the distribution of descending scheduling resource is carried out according to described channel information, can consider this cell downlink send and descending transmission on the impact of neighbor cell uplink receiving, thus the object eliminated largely and disturb between co-channel full duplex communication system cell simultaneously can be reached, promote the systematic function of co-channel full duplex communication system simultaneously.

Embodiment four:

The embodiment of the present invention four provides a kind of inter-cell interference cancellation device being applicable to method shown in the embodiment of the present invention one or embodiment three.Particularly, the integrated equipment etc. that described inter-cell interference cancellation device usually can be base station or arranges in a base station, the embodiment of the present invention is not limited in any way this.

Particularly, in embodiment four of the present invention, for described inter-cell interference cancellation device for base station is specifically described.As shown in Figure 5, it can comprise reference signal transmitting element 11, channel information receiving element 12 and downlink data transmitting element 13 for the structural representation of base station described in the embodiment of the present invention four, described base station, wherein:

Described reference signal transmitting element 11 can be used for sending downlink reference signal, carries out channel estimating and obtain corresponding channel information to make the adjacent base station of described base station according to described downlink reference signal;

Described channel information receiving element 12 can be used for the described channel information receiving described adjacent base station feedback;

The described channel information that described downlink data transmitting element 13 can be used for receiving according to described channel information receiving element 12 is that descending scheduling user distributes corresponding scheduling resource, and passes through distributed scheduling resource carries out data transmission to described descending scheduling user;

Wherein, described channel information comprises the channel information between the transmitting antenna of described base station and the reception antenna of described adjacent base station.

Particularly, at the same time in co-channel full duplex communication system, channel information between the transmitting antenna of described base station and the reception antenna of described adjacent base station at least can be relevant with interference signal between the transmitting antenna of described base station and the reception antenna of described adjacent base station, and the embodiment of the present invention is not limited in any way this.

It should be noted that; in embodiment of the present invention; the channel information of described adjacent base station accessed by described downlink reference signal is except can comprising the channel information between the transmitting antenna of described base station and the reception antenna of described adjacent base station; usually the channel information between base station and user can also be comprised; as as described in base station and as described in channel information etc. between user in each community of adjacent base station, the embodiment of the present invention is not also limited in any way this.

Further, in embodiment of the present invention, in order to improve the accuracy of channel information measurement, the described downlink reference signal that described first base station sends need meet the following conditions usually:

Described downlink reference signal is orthogonal with the uplink reference signals of the uplink reference signals of each Serving cell of described base station and each Serving cell of described adjacent base station respectively, wherein, carrying out orthogonal resource can be time domain, frequency domain or code channel etc., and the embodiment of the present invention is not limited in any way this; Or,

In the resource that described downlink reference signal uses, each Serving cell of described base station and each Serving cell of described adjacent base station adopt the mode of mourning in silence to carry out the transmission of upstream data, wherein, the resource that described downlink reference signal uses can by master controller, as unified each base stations be handed down in system such as base station controllers, the embodiment of the present invention does not repeat this.

Further, due to for while co-channel full duplex communication system in each base station, the measurement of the self-interference channel between transmitting antenna to reception antenna needs the adjustment of transmitted power, because excessive transmitted power can make receiving circuit saturated, cause base station normally to work, therefore, the reference signal measured for interference channel between base station can not be used as the measurement of self-interference channel.That is, when not being provided with interference cancellation circuit (namely cannot accomplish good isolation between base station end dual-mode antenna) for eliminating the interference signal between the transmitting antenna of described base station and the reception antenna of described base station in described base station, it is also orthogonal for the signal carrying out self-interference channel measurement that described downlink reference signal and described base station send, to ensure the accuracy of channel information measurement.

Further, described base station can also comprise private resource allocation units 14, wherein:

If described private resource allocation units 14 can be used for the described channel information fed back according to described adjacent base station, determining that the interference channel power between described base station and described adjacent base station is greater than setting threshold, is then that described adjacent base station assigned with dedicated channel measures resource.Correspondingly, described reference signal transmitting element 11 is specifically used in described dedicated channel and measures transmission resource being carried out described downlink reference signal.

Wherein, measure in resource in described dedicated channel, the transmission of upward signal and downstream signal is not carried out in each Serving cell of described base station and each Serving cell of described adjacent base station, improves the accuracy of channel information measurement result with this.

Further, in embodiment of the present invention, described base station can also comprise data precoding unit 15, wherein:

Described data precoding unit 15 is used in and passes through before distributed scheduling resource carries out the transmission of data to described descending scheduling user, according to the described channel information that described adjacent base station feeds back, to carry out precoding to the data of described descending scheduling user.Particularly, in embodiment of the present invention, described data precoding unit 15 can adopt and carry out precoding processing to the data of Beamforming algorithm to described descending scheduling user of adjacent base station formation " zero falls into ", to reach while guarantee downlink traffic transmission, reduce the object of this community to the interference of neighbor cell uplink user.

Correspondingly, described downlink data transmitting element 13 specifically can be used for passing through distributed scheduling resource, sends the descending scheduling user data after precoding.

The embodiment of the present invention four provides a kind of inter-cell interference cancellation device being applicable to co-channel full duplex communication system simultaneously, due to when carrying out the transmission of data to descending scheduling user, can receiving neighbor bs feedback base station transmitting antenna and adjacent base station reception antenna between channel information, and the distribution of descending scheduling resource is carried out according to described channel information, can consider this cell downlink send and descending transmission on the impact of neighbor cell uplink receiving, thus the object eliminated largely and disturb between co-channel full duplex communication system cell simultaneously can be reached, promote the systematic function of co-channel full duplex communication system simultaneously.

Embodiment five:

The embodiment of the present invention five provides a kind of inter-cell interference cancellation device being applicable to method shown in the embodiment of the present invention two or embodiment three.Particularly, the integrated equipment etc. that described inter-cell interference cancellation device usually can be base station or arranges in a base station, the embodiment of the present invention is not limited in any way this.

Particularly, in embodiment five of the present invention, for described inter-cell interference cancellation device for base station is specifically described.As shown in Figure 6, it can comprise reference signal receiving element 21, channel information acquisition unit 22 and feedback of channel information unit 23 for the structural representation of base station described in the embodiment of the present invention five, described base station, wherein:

The downlink reference signal that the adjacent base station that described reference signal receiving element 21 can be used for receiving described base station sends;

The described downlink reference signal that described channel information acquisition unit 22 can be used for receiving according to described reference signal receiving element 21 carries out channel estimating to obtain corresponding channel information, wherein, accessed channel information comprises the channel information between the transmitting antenna of described adjacent base station and the reception antenna of described base station;

Described feedback of channel information unit 23 can be used for by the described feedback of channel information got to described adjacent base station, with make described adjacent base station according to described in the channel information that gets distribute corresponding scheduling resource for descending scheduling user and pass through distributed scheduling resource to carry out data transmission to described descending scheduling user; Particularly, described feedback of channel information unit 23 can be used for the described feedback of channel information got to described adjacent base station, with make described adjacent base station according to described in the channel information that gets distribute corresponding scheduling resource for descending scheduling user, and precoding is carried out to the data of described descending scheduling user, and, pass through distributed scheduling resource, the descending scheduling user data after precoding is sent.

Wherein, described feedback of channel information unit 23 can adopt and carry out precoding processing to the data of Beamforming algorithm to described descending scheduling user of adjacent base station formation " zero falls into ", to reach while guarantee downlink traffic transmission, reduce the object of this community to the interference of neighbor cell uplink user, the embodiment of the present invention does not repeat this.

Further, in embodiment of the present invention, at the same time in co-channel full duplex communication system, channel information between the transmitting antenna of described adjacent base station and the reception antenna of described base station at least can be relevant with interference signal between the transmitting antenna of described adjacent base station and the reception antenna of described base station, and the embodiment of the present invention is not limited in any way this.

It should be noted that; in embodiment of the present invention; the channel information of described base station accessed by described downlink reference signal is except can comprising the channel information between the transmitting antenna of described adjacent base station and the reception antenna of described base station; usually the channel information between base station and user can also be comprised; as as described in adjacent base station and as described in channel information etc. between user in each community, base station, the embodiment of the present invention is not limited in any way this.

In the resource that described downlink reference signal uses, each Serving cell of described base station and each Serving cell of described adjacent base station adopt the mode of mourning in silence to carry out the transmission of upstream data, wherein, the resource that described downlink reference signal uses can by master controller, as unified each base stations be handed down in system such as base station controllers, the embodiment of the present invention does not repeat this.。

Further, due to for while co-channel full duplex communication system in each base station, the measurement of the self-interference channel between transmitting antenna to reception antenna needs the adjustment of transmitted power, because excessive transmitted power can make receiving circuit saturated, cause base station normally to work, therefore, the reference signal measured for interference channel between base station can not be used as the measurement of self-interference channel.That is, when not being provided with interference cancellation circuit (namely cannot accomplish good isolation between base station end dual-mode antenna) for eliminating the interference signal between the transmitting antenna of described adjacent base station and the reception antenna of described adjacent base station in described adjacent base station, it is also orthogonal for the signal carrying out self-interference channel measurement that described downlink reference signal and described adjacent base station send, to ensure the accuracy of channel information measurement.

Further, described base station can also comprise private resource indicating member 24, wherein:

If described private resource indicating member 24 can be used for according to the described channel information got, determine that the interference channel power between described adjacent base station and described base station is greater than setting threshold, then indicate described adjacent base station to be that described base station assigns dedicated channel is measured resource and measures transmission resource being carried out described downlink reference signal in described dedicated channel.

Wherein, measure in resource in described dedicated channel, the transmission of upward signal and downstream signal is not carried out in each Serving cell of described adjacent base station and each Serving cell of described base station, improves the accuracy of channel information measurement result with this.

The embodiment of the present invention five provides a kind of inter-cell interference cancellation device being applicable to co-channel full duplex communication system simultaneously, due to when carrying out the channel estimating of down channel, can measure the channel between base station receive antenna and adjacent base station transmitting antenna and feed back to adjacent base station, to make adjacent base station when carrying out the distribution of descending scheduling resource, can consider this cell downlink send and descending transmission on the impact of neighbor cell uplink receiving, thus the object eliminated largely and disturb between co-channel full duplex communication system cell simultaneously can be reached, promote the systematic function of co-channel full duplex communication system simultaneously.

Embodiment six:

The embodiment of the present invention six provides a kind of inter-cell interference cancellation system being applicable to co-channel full duplex communication system simultaneously.Particularly, as shown in Figure 7, it is the structural representation of inter-cell interference cancellation system described in the embodiment of the present invention six, and described system can comprise at least one first base station 31 and at least one the second base station 32, wherein:

Described first base station 31 can be used for sending downlink reference signal, and receive the channel information fed back described second base station 32, and, be that descending scheduling user distributes corresponding scheduling resource according to described channel information, and pass through distributed scheduling resource carries out data transmission to described descending scheduling user, wherein, described channel information comprises the channel information between the transmitting antenna of described first base station 31 and the reception antenna of described second base station 32;

Described second base station 32 can be used for the downlink reference signal receiving described first base station 31 transmission, and carries out channel estimating to obtain corresponding channel information according to described downlink reference signal, and, give described first base station 31 by accessed feedback of channel information.

Particularly, at the same time in co-channel full duplex communication system, channel information between the transmitting antenna of described first base station 31 and the reception antenna of described second base station 32 at least can be relevant with interference signal between the transmitting antenna of described first base station 31 and the reception antenna of described second base station 32, and the embodiment of the present invention is not limited in any way this.

It should be noted that; in embodiment of the present invention; the channel information of described second base station 32 accessed by described downlink reference signal is except can comprising the channel information between the transmitting antenna of described first base station 31 and the reception antenna of described second base station 32; usually the channel information between base station and user can also be comprised; as as described in the first base station 31 and as described in channel information etc. between user in second each community, base station 32, the embodiment of the present invention is not also limited in any way this.

It should be noted that again, the function of described first base station 31 and described second base station 32 is interchangeable, namely in embodiment of the present invention, for the arbitrary base station in system, described base station can possess the function that described first base station 31 and described second base station 32 possess simultaneously.It should be noted that in addition, the concrete structure of described first base station 31 and described second base station 32 is similar with the base station described in the embodiment of the present invention four and the embodiment of the present invention five respectively, and the embodiment of the present invention repeats no more this.

The embodiment of the present invention six provides a kind of inter-cell interference cancellation system being applicable to co-channel full duplex communication system simultaneously, due to when carrying out the channel estimating of down channel, can measure the channel between base station receive antenna and adjacent base station transmitting antenna and feed back to adjacent base station, to make adjacent base station when carrying out the distribution of descending scheduling resource, can consider this cell downlink send and descending transmission on the impact of neighbor cell uplink receiving, thus the object eliminated largely and disturb between co-channel full duplex communication system cell simultaneously can be reached, promote the systematic function of co-channel full duplex communication system simultaneously.

It will be understood by those skilled in the art that embodiments of the invention can be provided as method, device (equipment) or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code.

The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, device (equipment) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.

Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.

Claims

1. an inter-cell interference cancellation method, the while of being applicable in co-channel full duplex communication system, is characterized in that, comprising:

2. inter-cell interference cancellation method as claimed in claim 1, is characterized in that,

Described downlink reference signal is orthogonal with the uplink reference signals of the uplink reference signals of each Serving cell of described first base station and each Serving cell of described second base station respectively; Or,

3. inter-cell interference cancellation method as claimed in claim 2, is characterized in that,

When not being provided with the interference cancellation circuit for eliminating the interference signal between the transmitting antenna of described first base station and the reception antenna of described first base station in described first base station, the signal in orthogonal for carrying out self-interference channel measurement that described downlink reference signal also sends with described first base station.

4. the inter-cell interference cancellation method as described in as arbitrary in claims 1 to 3, it is characterized in that, described method also comprises:

5. inter-cell interference cancellation method as claimed in claim 4, is characterized in that,

Measure in resource in described dedicated channel, the transmission of upward signal and downstream signal is not carried out in each Serving cell of described first base station and each Serving cell of described second base station.

6. the inter-cell interference cancellation method as described in as arbitrary in claims 1 to 3, is characterized in that, passing through before distributed scheduling resource carries out the transmission of data to described descending scheduling user, described method also comprises:

7. an inter-cell interference cancellation method, the while of being applicable in co-channel full duplex communication system, is characterized in that, comprising:

8. inter-cell interference cancellation method as claimed in claim 7, is characterized in that,

9. inter-cell interference cancellation method as claimed in claim 8, is characterized in that,

10. the inter-cell interference cancellation method as described in as arbitrary in claim 7 ~ 9, it is characterized in that, described method also comprises:

11. inter-cell interference cancellation methods as claimed in claim 10, is characterized in that,

12. as arbitrary in claim 7 ~ 9 as described in inter-cell interference cancellation method, it is characterized in that, described first base station is given by the described feedback of channel information got, with make described first base station according to described in the channel information that gets distribute corresponding scheduling resource for descending scheduling user and pass through the transmission that distributed scheduling resource carries out data to described descending scheduling user, comprising:

13. 1 kinds of base stations, the while of being applicable in co-channel full duplex communication system, is characterized in that, comprising:

Downlink data transmitting element, described channel information for receiving according to described information receiving unit is that descending scheduling user distributes corresponding scheduling resource, and pass through distributed scheduling resource carries out data transmission to described descending scheduling user, wherein, described channel information comprises the channel information between the transmitting antenna of described base station and the reception antenna of described adjacent base station.

14. base stations as claimed in claim 13, is characterized in that,

Described downlink reference signal is orthogonal with the uplink reference signals of the uplink reference signals of each Serving cell of described base station and each Serving cell of described adjacent base station respectively; Or,

15. base stations as claimed in claim 14, is characterized in that,

When not being provided with the interference cancellation circuit for eliminating the interference signal between the transmitting antenna of described base station and the reception antenna of described base station in described base station, the signal in orthogonal for carrying out self-interference channel measurement that described downlink reference signal also sends with described base station.

16. as arbitrary in claim 13 ~ 15 as described in base station, it is characterized in that, described base station also comprises private resource allocation units:

17. base stations as claimed in claim 16, is characterized in that,

Measure in resource in described dedicated channel, the transmission of upward signal and downstream signal is not carried out in each Serving cell of described base station and each Serving cell of described adjacent base station.

18. as arbitrary in claim 13 ~ 15 as described in base station, it is characterized in that, described base station also comprises data precoding unit:

19. 1 kinds of base stations, is characterized in that, the while of being applicable in co-channel full duplex communication system, comprising:

Channel information acquisition unit, described downlink reference signal for receiving according to described reference signal receiving element carries out channel estimating to obtain corresponding channel information, wherein, accessed channel information comprises the channel information between the transmitting antenna of described adjacent base station and the reception antenna of described base station;

20. base stations as claimed in claim 19, is characterized in that,

Described downlink reference signal is orthogonal with the uplink reference signals of the uplink reference signals of each Serving cell of described adjacent base station and each Serving cell of described base station respectively; Or,

21. base stations as claimed in claim 20, is characterized in that,

When not being provided with the interference cancellation circuit for eliminating the interference signal between the transmitting antenna of described adjacent base station and the reception antenna of described adjacent base station in described adjacent base station, the signal in orthogonal for carrying out self-interference channel measurement that described downlink reference signal also sends with described adjacent base station.

22. as arbitrary in claim 19 ~ 21 as described in base station, it is characterized in that, described base station also comprises private resource indicating member:

23. base stations as claimed in claim 22, is characterized in that,

Measure in resource in described dedicated channel, the transmission of upward signal and downstream signal is not carried out in each Serving cell of described adjacent base station and each Serving cell of described base station.

24. as arbitrary in claim 19 ~ 21 as described in base station, it is characterized in that,

Described feedback of channel information unit, specifically for giving described adjacent base station by the described feedback of channel information got, with make described adjacent base station according to described in the channel information that gets distribute corresponding scheduling resource for descending scheduling user, and precoding is carried out to the data of described descending scheduling user, and, pass through distributed scheduling resource, the descending scheduling user data after precoding is sent.

25. 1 kinds of inter-cell interference cancellation systems, the while of being applicable in co-channel full duplex communication system, is characterized in that, comprise at least one first base station and at least one the second base station, wherein: