CN102340394A

CN102340394A - Determination method and device of relay link resource unit group as well as base station

Info

Publication number: CN102340394A
Application number: CN201010236752XA
Authority: CN
Inventors: 毕峰; 袁明; 梁枫; 杨瑾; 吴栓栓; 袁弋非
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2010-07-22
Filing date: 2010-07-22
Publication date: 2012-02-01
Anticipated expiration: 2030-07-22
Also published as: WO2012010029A1; CN102340394B

Abstract

The invention discloses a determination method of a relay link resource unit group, and the determination method comprises the following step: determining the resource unit group of a relay link according to at least one type of information of sub-frame types, sub-frame cyclic prefix types and reference marks in the loading bearing mode of sub-frames. The invention simultaneously discloses a determination device of the relay link resource unit group, and the determination device comprises a determination unit, wherein the determination unit is used for determining the resource unit group of the relay link according to at least one type of information of the sub-frame types, sub-frame cyclic prefix types and reference marks in the loading bearing mode of the sub-frames; and the loading mode of the reference marks in the sub-frames is determined according to the types of the loaded reference marks and the antenna port number corresponding to the reference marks. The invention also discloses a base station comprising the device. According to the invention, the backward compatibility, namely a compatible LTE (Long Term Evolution) system is ensured, and the problem of relay link resource unit group dimension is solved. According to the invention, less modification is performed on the existing network protocol, and the technical scheme is easy to realized and low in cost.

Description

Definite method of repeated link resource unit group and device, base station

Technical field

The present invention relates to definite technology of repeated link resource unit group, relate in particular to a kind of definite method and device of repeated link resource unit group, and the base station.

Background technology

Long Term Evolution (LTE; Long Term Evolution) system, senior Long Term Evolution (LTE-A; Long Term Evolution Advanced) system, senior international mobile communication (IMT-Advanced; International Mobile Telecommunication Advanced) system all is to be the communication system on basis with OFDM (OFDM, Orthogonal Frequency Division Multiplexing) technology.The OFDM technology mainly is that the data mode with the time-frequency bidimensional carries out transfer of data.Fig. 1 is the structural representation of Resource Block in the subframe in the LTE-A system; As shown in Figure 1; In LTE, LTE-A system, Resource Block (RB, Resource Block) is defined as the OFDM symbol in continuous 1 time slot (slot) on time-domain; On frequency domain continuous 12 or the resource units of 24 number of sub-carrier, thus 1 RB by

Individual Resource Unit (RE, Resource Element), wherein, N _SymbThe number of representing the OFDM symbol in 1 slot,

The number of expression Resource Block continuous subcarrier on frequency domain.Resource block mapping is called as Physical Resource Block (Physical Resource Block) after on the physical resource.

Fig. 2 is frame structure sketch map in the LTE-A system, and is as shown in Figure 2, and in the LTE-A system, subframe type mainly is divided into the multicast subframe (each subframe is totally 2 time slots) of the unicast sub that is used for point-to-point transmission and point-to-multipoint transmission.Cyclic prefix type during mainly is divided into normal cyclic prefix (normal CP; Normal Cyclic Prefix) and extended cyclic prefix (extended CP; Extended Cyclic Prefix); Wherein, each subframe of normal CP is totally 14 OFDM symbols, and each subframe of extended CP is totally 12 OFDM symbols.In the above-mentioned subframe, OFDM symbol sequence number is from " 0 " open numbering, like the 1st OFDM symbol of " #0 " expression.The reference symbol that is used for demodulation mainly is divided into peculiar reference symbol in sub-district (CRS, Cell-specificReference Signals) and demodulated reference signal (DMRS, Demodulation Reference Signals); The reference symbol that is used to measure mainly is divided into CRS and channel state information reference signals (CSI-RS, Channel State Information-Reference Signals), and concrete, the concrete bearing mode of above-mentioned reference symbol or reference signal is following:

In the unicast sub of normal cyclic prefix, CRS mainly is distributed on the 1st, the 2nd, the 5th the OFDM symbol of the 1st and the 2nd time slot;

In the unicast sub of extended cyclic prefix, CRS mainly is distributed on the 1st, the 2nd, the 4th the OFDM symbol of the 1st and the 2nd time slot;

In multicast subframe, CRS mainly is distributed on the 1st, the 2nd the OFDM symbol of the 1st time slot;

In the unicast sub or multicast subframe of normal cyclic prefix, DMRS mainly is distributed on the 6th, the 7th the OFDM symbol of the 1st and the 2nd time slot; Or be distributed on the 6th, the 7th the OFDM symbol of the 1st time slot, on the 3rd, the 4th the OFDM symbol of the 2nd time slot;

In the unicast sub or multicast subframe of extended cyclic prefix, DMRS mainly is distributed on the 5th, the 6th the OFDM symbol of the 1st and the 2nd time slot; Or be distributed on the 5th, the 6th the OFDM symbol of the 1st time slot, on the 3rd, the 5th the OFDM symbol of the 2nd time slot.

And, certain transmit cycle is arranged on time-domain for CSI-RS, and certain frequency interval is arranged on frequency domain, the subframe of central stepchild's frame and CSI-RS emission explains that this relay sub-frame does not comprise CSI-RS not simultaneously; In the middle of the subframe of stepchild's frame and CSI-RS emission explain in this relay sub-frame when identical and comprise CSI-RS, that is to say that CSI-RS and CRS, DMRS might all be carried in the same subframe at this moment.

Fig. 3 is the structural representation of the system behind the introducing relay station in the LTE-A system; As shown in Figure 3; Introduce in the LTE-A system after relaying (relay) node such as the relay station; Increased new link; Concrete: the link between eNode-B and the relay is called the link that the link between back haul link or repeated link (backhaul link), relay and the subscriber equipment (UE, User Equipment) is called between access link (access link), eNode-B and the UE and is called the link that direct transfers (direct link).

At present; Physical Downlink Control Channel (R-PDCCH for repeated link; Relay link-Physical Downlink Control Channel) research of multiplex mode is a focus and between the Physical Downlink Shared Channel of repeated link (R-PDSCH, Relay link-Physical Downlink Shared Channel), but to the technology except that the size of the resource unit group of R-PDCCH; Do not launch research at present, do not have relevant reference technique certainly yet.

Summary of the invention

In view of this, main purpose of the present invention is to provide a kind of definite method and device, base station of repeated link resource unit group, can confirm preferable resource unit group for relay sub-frame, makes things convenient for the carrying of control information.

For achieving the above object, technical scheme of the present invention is achieved in that

A kind of definite method of repeated link resource unit group comprises:

Confirm the resource unit group of repeated link according to the cyclic prefix type during of subframe type, subframe, at least a information in the bearing mode of reference symbol in subframe.

Preferably, the bearing mode of said reference symbol in subframe confirmed according to the type and the said reference symbol corresponding antenna port number of carrying reference symbol.

Preferably, said resource unit group is made up of the Resource Unit RE on OFDM symbol among the RB;

Perhaps, said resource unit group is made up of the RE on two above OFDM symbols among the RB;

Perhaps, said resource unit group is made up of the RE among two adjacent on the frequency domain on the OFDM symbol above RB;

Perhaps, said resource unit group is made up of the RE among two adjacent on the frequency domain on two above OFDM symbols above RB.

Preferably, only there is CRS in first in unicast sub and/or second time slot, wherein, when CRS corresponding antenna port number is one, two or four; The resource unit group of said definite repeated link is:

On m the OFDM symbol among the RB in said first and/or second time slot; 12 RE are divided into two resource unit group; Every continuous six RE are a resource unit group, and per four complex symbols are mapped in the resource unit group not by on the shared Resource Unit of CRS; Perhaps, 12 RE are divided into four resource unit group, and every continuous three RE are a resource unit group, and per two complex symbols are mapped in the resource unit group not by on the shared Resource Unit of CRS; For the unicast sub of normal cyclic prefix, m=1 and/or 5, for the unicast sub of extended cyclic prefix, m=1 and/or 4.

When said CRS corresponding antenna port number was one, the mode when being two with CRS corresponding antenna port number was confirmed resource unit group.

Preferably, only have CRS in first in unicast sub and/or second time slot, wherein, CRS corresponding antenna port number is that the resource unit group of said definite repeated link is when one or two:

On second OFDM symbol among the RB in said first and/or second time slot; 12 RE are divided into three resource unit group; Every continuous four Resource Units are a resource unit group, and per four complex symbols are mapped on the Resource Unit in the resource unit group; Perhaps, 12 RE are divided into six resource unit group, and every continuous two RE are a resource unit group, and per two complex symbols are mapped on the Resource Unit in the resource unit group.

Preferably, only have CRS in first in unicast sub and/or second time slot, wherein, when CRS corresponding antenna port number was four, the resource unit group of said definite repeated link was:

On second OFDM symbol among the RB in said first and/or second time slot; 12 RE are divided into two resource unit group; Every continuous six RE are a resource unit group, and per four complex symbols are mapped in the resource unit group not by on the shared Resource Unit of CRS; Perhaps, 12 RE are divided into four resource unit group, and every continuous three RE are a resource unit group, and per two complex symbols are mapped in the resource unit group not by on the shared Resource Unit of CRS.

Preferably, only have the peculiar reference symbol CRS in sub-district in first in unicast sub and/or second time slot, wherein, when CRS corresponding antenna port number was one, two or four, the resource unit group of said definite repeated link was:

On m the OFDM symbol in said first and/or second time slot among RB; 12 RE are divided into three resource unit group; Every continuous four RE are a resource unit group, and per four complex symbols are mapped on the Resource Unit in the resource unit group; Perhaps, 12 RE are divided into six resource unit group, and every continuous two RE are a resource unit group, and per two complex symbols are mapped on the Resource Unit in the resource unit group; Wherein, for the unicast sub of normal cyclic prefix, m=3 and/or 4 and/or 6 and/or 7, for the unicast sub of extended cyclic prefix, m=3 and/or 5 and/or 6.

Preferably, have CRS and DMRS in first in unicast sub and/or second time slot, and said DMRS corresponding antenna port number is when being one, two, four or eight, the resource unit group of said definite repeated link is:

Resource unit group on m the OFDM symbol in said first and/or second time slot among RB is confirmed mode, and the resource unit group in m the OFDM symbol when only having CRS in first and/or second time slot in the unicast sub of normal cyclic prefix or extended cyclic prefix confirms that mode is identical.

Wherein, for the unicast sub of normal cyclic prefix, first and the interior m=1 and/or 2 and/or 3 and/or 4 and/or 5 of second time slot; Or, m=1 and/or 2 and/or 3 and/or 4 and/or 5, the second interior m=1 and/or 2 and/or 5 and/or 6 and/or 7 of time slot in first time slot;

For the extended cyclic prefix unicast sub, first and the interior m=1 and/or 2 and/or 3 and/or 4 of second time slot; Or, m=1 and/or 2 and/or 3 and/or 4, the second interior m=1 and/or 2 and/or 4 and/or 6 of time slot in first time slot.

Preferably, have CRS and DMRS in first in unicast sub and/or second time slot, and said DMRS corresponding antenna port number is when being four or eight, the resource unit group of said definite repeated link is:

On in said first and/or second time slot among RB m and/or n the OFDM symbol; 12 RE are divided into three resource unit group; Every continuous four RE are a resource unit group, and per two complex symbols are mapped in the resource unit group not by on the shared Resource Unit of DMRS;

Perhaps; On in said first and/or second time slot among RB m and/or n the OFDM symbol; Reserve two RE, per 12 RE are a resource unit group, and per four complex symbols are mapped in the resource unit group not by DMRS and/or reserve on the shared Resource Unit of RE; When the RE that is reserved is RE corresponding with CRS on the frequency domain; Per 12 RE are a resource unit group; Per four complex symbols are mapped in the resource unit group not by DMRS and/or reserve on the shared Resource Unit of RE, and perhaps, 12 RE are divided into two resource unit group; Every continuous six RE are a resource unit group, and per two complex symbols are mapped in the resource unit group not by DMRS and/or reserve on the shared Resource Unit of RE;

Perhaps; In said first and/or second time slot among RB m binds with n OFDM symbol; Per four RE are a resource unit group, are divided into three resource unit group, and per four complex symbols are mapped in the resource unit group not by on the shared Resource Unit of DMRS;

Perhaps; On in said first and/or second time slot among adjacent two RB m and/or n the OFDM symbol; 24 RE are divided into three resource unit group; Every continuous eight RE are a resource unit group, and per four complex symbols are mapped in the resource unit group not by on the shared Resource Unit of DMRS;

Wherein, for the normal cyclic prefix unicast sub, m=6 in said first and/or second time slot, n=7; Perhaps, m=6 in first time slot, n=7, m=3 in second time slot, n=4;

For the extended cyclic prefix unicast sub, m=5 in said first and/or second time slot, n=6; Or, perhaps, m=5 in first time slot, n=6, m=3 in second time slot, n=5.

Preferably, have CRS and DMRS in first in unicast sub and/or second time slot, and said DMRS corresponding antenna port number is when being one or two, the resource unit group of said definite repeated link is:

Resource unit group in said first and/or second time slot among RB m and/or n the OFDM symbol is confirmed mode; With the unicast sub of normal cyclic prefix or extended cyclic prefix, and the resource unit group when existing CRS to have the DMRS of four or eight ports simultaneously in first and/or second time slot confirms that mode is identical; Or,

On in said first and/or second time slot among RB m and/or n the OFDM symbol; Reserve a RE, 12 RE are divided into two resource unit group, and every continuous six RE are a resource unit group; Per four complex symbols are mapped in the resource unit group not by on the shared Resource Unit of DMRS; Or, reserving a RE, 12 RE are divided into a resource unit group; Every continuous 12 RE are a resource unit group, and per eight complex symbols are mapped in the resource unit group not by on the shared Resource Unit of DMRS;

Preferably, when only having one, two or four CRS in first in multicast subframe and/or second time slot, the resource unit group of said definite repeated link is:

Resource unit group on m the OFDM symbol among the RB in said first and/or second time slot is confirmed mode, and the resource unit group in m the OFDM symbol when only having CRS in first and/or second time slot in the unicast sub of normal cyclic prefix or extended cyclic prefix confirms that mode is identical; Wherein, m=1 and/or 2;

On m the OFDM symbol among the RB in said first and/or second time slot; 12 RE are divided into three resource unit group; Every continuous four RE are a resource unit group, and per four complex symbols are mapped on the Resource Unit in the resource unit group; Perhaps, 12 RE are divided into six resource unit group, and every continuous two RE are a resource unit group, and per two complex symbols are mapped on the Resource Unit in the resource unit group; Wherein, for the normal cyclic prefix multicast subframe, m=3 and/or 4 and/or 5 and/or 6 and/or 7, the second interior m=1 and/or 2 and/or 3 and/or 4 and/or 5 and/or 6 and/or 7 of time slot in first time slot; For the extended cyclic prefix multicast subframe, m=3 and/or 4 and/or 5 and/or 6, the second interior m=1 and/or 2 and/or 3 and/or 4 and/or 5 and/or 6 of time slot in first time slot.

Preferably, when having CRS and DMRS in first in multicast subframe and/or second time slot, wherein, said CRS corresponding antenna port number is one, two or four; Said DMRS corresponding antenna port number is one, two, four or eight; The resource unit group of said definite repeated link is:

Resource unit group on m the OFDM symbol among the RB in said first and/or second time slot is confirmed mode; With the unicast sub of normal cyclic prefix or extended cyclic prefix, and the resource unit group in m the OFDM symbol when only having CRS in first and/or second time slot confirms that mode is identical.

Wherein, first and the interior m=1 and/or 2 and/or 3 and/or 4 and/or 5 of second time slot of normal cyclic prefix unicast sub; Or, m=1 and/or 2 and/or 3 and/or 4 and/or 5, the second interior m=1 and/or 2 and/or 5 and/or 6 and/or 7 of time slot in first time slot;

First of extended cyclic prefix unicast sub and the interior m=1 and/or 2 and/or 3 and/or 4 of second time slot; Or, first time slot m=1 and/or 2 and/or 3 and/or 4, the second interior m=1 and/or 2 and/or 4 and/or 6 of time slot.

Resource unit group in said first and/or second time slot among RB m and/or n the OFDM symbol is confirmed mode; With the unicast sub of normal cyclic prefix or extended cyclic prefix, and when having the DMRS of one, two, four or eight port in first and/or second time slot m and/or n the interior resource unit group mapping mode of OFDM symbol are identical.

Wherein, for the normal cyclic prefix multicast subframe, first and the interior m=6 of second time slot, n=7; Perhaps, m=6 in first time slot, n=7, m=3 in second time slot, n=4; For the extended cyclic prefix multicast subframe, first and the interior m=5 of second time slot, n=6; Perhaps, m=5 in first time slot, n=6, m=3 in second time slot, n=5.

Preferably, said method also comprises:

When the subframe of relay sub-frame and Bearer Channel state information reference signals CSI-RS was identical, resource unit group was by not constituted by CSI-RS and/or DMRS and/or the shared RE of reserved resource; Perhaps, resource unit group is made up of the RE on the OFDM symbol that does not comprise CSI-RS; Perhaps, CSI-RS is not carried in the Physical Resource Block PRB that repeated link Physical Downlink Control Channel R-PDCCH takies.

A kind of definite device of repeated link resource unit group comprises:

Confirm the unit, be used for the cyclic prefix type during according to subframe type, subframe, the resource unit group that at least a information of reference symbol in the bearing mode of subframe is confirmed repeated link.

Preferably, said definite unit is further confirmed:

Said resource unit group is made up of the Resource Unit RE on OFDM symbol among the RB;

Preferably, only have CRS in first in unicast sub and/or second time slot, wherein, when CRS corresponding antenna port number is one, two or four, said definite unit further,

On m the OFDM symbol among the RB in said first and/or second time slot; 12 RE are divided into two resource unit group; Every continuous six RE are a resource unit group, and per four complex symbols are mapped in the resource unit group not by on the shared Resource Unit of CRS; Perhaps, 12 RE are divided into four resource unit group, and every continuous three RE are a resource unit group, and per two complex symbols are mapped in the resource unit group not by on the shared Resource Unit of CRS; For the unicast sub of normal cyclic prefix, m=1 and/or 5, for the unicast sub of extended cyclic prefix, m=1 and/or 4;

When said CRS corresponding antenna port number is one, said definite unit further, the mode when being two with CRS corresponding antenna port number is confirmed resource unit group.

Preferably, only have CRS in first in unicast sub and/or second time slot, wherein, CRS corresponding antenna port number is when one or two, said definite unit further,

Preferably, only have CRS in first in unicast sub and/or second time slot, wherein, when CRS corresponding antenna port number is four, said definite unit further,

Preferably, have CRS and DMRS in first in unicast sub and/or second time slot, and said DMRS corresponding antenna port number is when being one, two, four or eight, said definite unit further,

Resource unit group on m the OFDM symbol in said first and/or second time slot among RB is confirmed mode, and the resource unit group in m the OFDM symbol when only having CRS in first and/or second time slot in the unicast sub of normal cyclic prefix or extended cyclic prefix confirms that mode is identical;

Preferably, have CRS and DMRS in first in unicast sub and/or second time slot, and said DMRS corresponding antenna port number is when being four or eight, said definite unit further,

Perhaps; M among RB in said first and/or second time slot is bound with n OFDM symbol; Per four RE are a resource unit group; Be divided into three resource unit group, per four complex symbols are mapped in the resource unit group not by on the shared Resource Unit of DMRS;

Preferably, have CRS and DMRS in first in unicast sub and/or second time slot, and said DMRS corresponding antenna port number is when being one or two, said definite unit further,

Preferably, when only having one, two or four CRS in first in multicast subframe and/or second time slot, said definite unit further,

Preferably, when having CRS and DMRS in first in multicast subframe and/or second time slot, wherein, said CRS corresponding antenna port number is one, two or four; Said DMRS corresponding antenna port number is one, two, four or eight; Said definite unit further,

Resource unit group on m the OFDM symbol among the RB in said first and/or second time slot is confirmed mode; With the unicast sub of normal cyclic prefix or extended cyclic prefix, and the resource unit group in m the OFDM symbol when only having CRS in first and/or second time slot confirms that mode is identical;

First of extended cyclic prefix unicast sub and the interior m=1 and/or 2 and/or 3 and/or 4 of second time slot; Perhaps, first time slot m=1 and/or 2 and/or 3 and/or 4, the second interior m=1 and/or 2 and/or 4 and/or 6 of time slot.

Resource unit group in said first and/or second time slot among RB m and/or n the OFDM symbol is confirmed mode; With the unicast sub of normal cyclic prefix or extended cyclic prefix, and when having the DMRS of one, two, four or eight port in first and/or second time slot m and/or n the interior resource unit group mapping mode of OFDM symbol are identical;

Preferably, when said definite unit confirms that further the subframe of relay sub-frame and carrying CSI-RS is identical, confirm that said resource unit group is by not constituted by CSI-RS and/or DMRS and/or the shared RE of reserved resource; Perhaps, said resource unit group is made up of the RE on the OFDM symbol that does not comprise CSI-RS; Perhaps, CSI-RS is not carried in the PRB that R-PDCCH takies.

A kind of base station comprises definite device of aforementioned arbitrary described repeated link resource unit group, is used to relay sub-frame and confirms resource unit group.

In communication system, introduce after the relay station, relay sub-frame also need design according to the communication needs of reality.Among the present invention; To the carrying situation of reference signal in the relay sub-frame, also the Resource Unit to bear control information carries out respective design, like this; When in relay sub-frame, carrying corresponding control information, get final product in the resource unit group that directly is carried to the present invention and is designed.The present invention had both guaranteed that backwards compatibility was a compatible LTE system, had also solved the problem of repeated link resource unit group size.The present invention is less to the modification of existing network protocol, and the technical scheme realization is simple and cost is lower.

Description of drawings

Fig. 1 is the structural representation of Resource Block in the subframe in the LTE-A system;

Fig. 2 is a frame structure sketch map in the LTE-A system;

Fig. 3 is the structural representation of the system behind the introducing relay station in the LTE-A system;

Fig. 4 is the reference symbol bearing mode sketch map during the corresponding antenna port of CRS in the normal cyclic prefix unicast sub;

Fig. 5 is the reference symbol bearing mode sketch map when carrying CRS and DMRS in the normal cyclic prefix unicast sub;

Fig. 6 is the reference symbol bearing mode sketch map when carrying CRS and DMRS in the multicast subframe of extended cyclic prefix;

Fig. 7 is a relay sub-frame and the subframe of the carrying CSI-RS reference symbol bearing mode sketch map when same subframe not;

Fig. 8 is relay sub-frame and the reference symbol bearing mode sketch map of subframe when same subframe that carries CSI-RS.

Embodiment

Basic thought of the present invention does, to the situation that carries CRS and/or DMRS and/or CSI-RS in the relay sub-frame, in RB; The distribution of unappropriated RE is in disorder relatively; When these RE bear control information, RE distributes that problem will be quite outstanding improperly, if RE distributes improper or do not have rule; For receiving terminal, can not carry out demodulation well, this will have a strong impact on the communication service of relay system.

For making the object of the invention, technical scheme and advantage clearer, below lift embodiment and with reference to accompanying drawing, to further explain of the present invention.

Among the present invention, when RE is divided into groups, mainly be to consider subframe type, the cyclic prefix type during of subframe, the information such as bearing mode of reference symbol in subframe.Wherein, the bearing mode of reference symbol in subframe need be confirmed according to the type and the said reference symbol corresponding antenna port number of the reference symbol of being carried in the subframe.That is to say, reference symbol difference of carrying in the subframe and reference symbol corresponding antenna port number not simultaneously, the bearing mode of reference symbol in subframe also can be different.Among the present invention, reference symbol comprises CRS, DMRS and CSI-RS etc.The bearing modes of reference symbol in subframe etc. have relevant provisions in the existing protocol, the present invention's its details that will repeat no more.

Among the present invention, the basic division principle of resource unit group does, can all RE among the RB be divided into groups, and the quantity of the available RE in each resource unit group and the position in this resource unit group are identical as far as possible.That is to say; Technical scheme of the present invention is being carried out the RE grouping to a RB or limited RB; Make the distribution of the resource unit group among this or limited the RB identical, and what the classification of the resource unit group of being distributed among this or limited the RB was tried one's best again lack.Here, the classification of resource unit group mainly is to confirm whether the RE distribution situation between the resource unit group is identical, and promptly whether the distribution situation of occupied (being taken by the reference symbol) RE in the resource unit group is identical with the distribution situation of unappropriated RE.Based on mentioned above principle, resource unit group of the present invention is made up of the RE on OFDM symbol among the RB; Perhaps, resource unit group of the present invention is made up of the RE on two above OFDM symbols among the RB; Perhaps, resource unit group of the present invention is made up of the RE among two adjacent on the frequency domain on the OFDM symbol above RB; Perhaps, resource unit group of the present invention is made up of the RE among two adjacent on the frequency domain on two above OFDM symbols above RB.

Concrete, when only having the peculiar reference symbol CRS in, two or four port sub-districts in first in unicast sub and/or second time slot, the resource unit group of said definite repeated link is:

On m the OFDM symbol among the RB in said first and/or second time slot; 12 RE are divided into two resource unit group; Every continuous six RE are a resource unit group, and per four complex symbols are mapped in the resource unit group not by on the shared Resource Unit of CRS; Perhaps, 12 RE are divided into four resource unit group, and every continuous three RE are a resource unit group, and per two complex symbols are mapped in the resource unit group not by on the shared Resource Unit of CRS; For the unicast sub of normal cyclic prefix, m=1 and/or 5, for the unicast sub of extended cyclic prefix, m=1 and/or 4.Here, complex symbol is the symbol with time domain and frequency domain characteristic, the symbol that is promptly carried by RE.

Concrete, when only having one or two port CRS in first in unicast sub and/or second time slot, the resource unit group of said definite repeated link is:

Concrete, when only having four port CRS in first in unicast sub and/or second time slot, the resource unit group of said definite repeated link is:

Concrete, have CRS and DMRS in first in unicast sub and/or second time slot, and said DMRS corresponding antenna port number is when being one, two, four or eight, the resource unit group of said definite repeated link is:

Concrete, have CRS and DMRS in first in unicast sub and/or second time slot, and said DMRS corresponding antenna port number is when being four or eight, the resource unit group of said definite repeated link is:

Perhaps; On in said first and/or second time slot among RB m and/or n the OFDM symbol; Reserve two RE; Per 12 RE are a resource unit group, and per four complex symbols are mapped in the resource unit group not by DMRS and/or reserve on the shared Resource Unit of RE; When the RE that is reserved is RE corresponding with CRS on the frequency domain; Per 12 RE are a resource unit group; Per four complex symbols are mapped in the resource unit group not by DMRS and/or reserve on the shared Resource Unit of RE, and perhaps, 12 RE are divided into two resource unit group; Every continuous six RE are a resource unit group, and per two complex symbols are mapped in the resource unit group not by DMRS and/or reserve on the shared Resource Unit of RE;

Perhaps; In said first and/or second time slot among RB m binds with n OFDM symbol; Per four RE are a resource unit group; Be divided into three resource unit group, per four complex symbols are mapped in the resource unit group not by on the shared Resource Unit of DMRS;

Concrete, have CRS and DMRS in first in unicast sub and/or second time slot, and said DMRS corresponding antenna port number is when being one or two, the resource unit group of said definite repeated link is:

Concrete, when only having one, two or four CRS in first in multicast subframe and/or second time slot, the resource unit group of said definite repeated link is:

Concrete, when having CRS and DMRS in first in multicast subframe and/or second time slot, wherein, said CRS corresponding antenna port number is one, two or four; Said DMRS corresponding antenna port number is one, two, four or eight; The resource unit group of said definite repeated link is:

Concrete; The subframe of central stepchild's frame and Bearer Channel state information reference signals CSI-RS is not simultaneously; Divide by the resource unit group dividing mode of aforementioned manner and to get final product; In the middle of the subframe of stepchild's frame and Bearer Channel state information reference signals CSI-RS when identical, resource unit group is by not constituted by CSI-RS and/or DMRS and/or the shared RE of reserved resource; Perhaps, resource unit group is made up of the RE on the OFDM symbol that does not comprise CSI-RS; Perhaps, CSI-RS is not carried in the Physical Resource Block PRB that repeated link Physical Downlink Control Channel R-PDCCH takies.

Below, through specific embodiment, further illustrate the essence of technical scheme of the present invention.

Embodiment one

Fig. 4 is the reference symbol bearing mode sketch map during the corresponding antenna port of CRS in the normal cyclic prefix unicast sub, and is as shown in Figure 4, expression be the unicast sub of normal cyclic prefix, subframe comprises 2 time slots, each time slot comprises 7 OFDM symbols.Suppose that R-PDCCH and R-PDSCH adopt time division multiplexing (TDM; Time Division Multiplexing) combines frequency division multiplexing (FDM; Frequency Division Multiplexing) multiplex mode; And R-PDCCH originates in the 4th OFDM symbol of the 1st time slot, and ends at last 1 OFDM symbol of the 1st time slot.

In the present embodiment, for making things convenient for the division of resource unit group, the CRS of a corresponding antenna port is regarded as corresponding to two antenna ports.As shown in Figure 4, the RE that the oblique line among the figure covers representes to carry the RE of CRS, but considers the dividing mode of the resource unit group in this example, and the RE that the vertical line among the figure is covered also is regarded as having carried CRS, and the RE that the vertical line in being about to scheme covers is as occupied RE.Based on above-mentioned hypothesis, the dividing mode of the resource unit group in this example is specific as follows.

Among the RB in the 1st time slot the 4th with the 6th and the 7th OFDM symbol on, per 4 Resource Units are 1 resource unit group, being divided into is 3 resource unit group, per 4 complex symbols are mapped on the interior Resource Unit of a resource unit group; On the 5th the OFDM symbol among the RB in the 1st time slot; Per 6 Resource Units are 1 resource unit group; Have 2 resource unit group, per 4 complex symbols are mapped in the resource unit group not by (be 1 port emission CRS at this moment, transmitting terminal and receiving terminal suppose that all 2 ports have all launched CRS on the shared Resource Unit in CRS and vertical line zone; The RE that its bend covers representes the CRS that port one is corresponding; The RE that vertical line covers representes the CRS position of port 2 correspondences, but in fact, does not launch CRS on the RE that vertical line covers).

As shown in Figure 4; The Resource Unit label " 0 " that the 4th and the 5th and the 6th and the 7th OFDM symbol 1 Resource Block on frequency direction can be used arrives " 43 "; And the mapping mode of these 44 Resource Units can first time domain direction after frequency direction; Or time orientation after the first frequency direction; Promptly can be that the 1st resource unit group is mapped on the Resource Unit of label for " 0 ", " 1 ", " 2 ", " 3 " correspondence; The 2nd resource unit group is mapped on the Resource Unit of label for " 4 ", " 5 ", " 6 ", " 7 " correspondence ..., the 11st resource unit group is mapped on the Resource Unit of label for " 40 ", " 41 ", " 42 ", " 43 " correspondence; Also can be that the 1st resource unit group is mapped on the Resource Unit of label for " 0 ", " 1 ", " 2 ", " 3 " correspondence; The 2nd resource unit group is mapped on the Resource Unit that label is " 12 ", " 13 ", " 14 ", " 15 " correspondence, and the 3rd resource unit group is mapped on the Resource Unit of label for " 20 ", " 21 ", " 22 ", " 23 " correspondence, and the 4th resource unit group is mapped on the Resource Unit of label for " 32 ", " 33 ", " 34 ", " 35 " correspondence; ..., the 11st resource unit group is mapped on the Resource Unit of label for " 40 ", " 41 ", " 42 ", " 43 " correspondence.

It will be appreciated by those skilled in the art that the dividing mode of the resource unit group among the dividing mode of its resource unit group and the embodiment one is identical when only carrying CRS and CRS corresponding to two antenna ports, four antenna ports in the subframe.

In this example, be to be mapped in the resource unit group on the unappropriated RE, also can be mapped in the resource unit group on the unappropriated RE with other number complex symbols such as 2,3 with per 4 complex symbols.As long as guarantee that the dividing mode of resource unit group is simple, identical, can in one or limited RB, divide to accomplish as far as possible and get final product.

Select for use per 4 complex symbols to be mapped in the last just preferred embodiment of unappropriated RE in the resource unit group among the present invention; Complex symbol can be the complex symbol after the constellation modulation, the complex symbol after many antenna processing, and complex symbol carries said control information.Be mapped in 2 complex symbols and describe embodiment one in the resource unit group on the unappropriated RE again.The division principle of following embodiment and mode and embodiment one are identical, give unnecessary details no longer one by one.

Among the RB in the 1st time slot the 4th with the 6th and the 7th OFDM symbol on, per 2 Resource Units are 1 resource unit group, being divided into is 6 resource unit group, per 2 complex symbols are mapped on the interior Resource Unit of a resource unit group; On the 5th the OFDM symbol among the RB in the 1st time slot; Per 3 Resource Units are 1 resource unit group; Have 4 resource unit group, per 2 complex symbols are mapped in the resource unit group not by (be 1 port emission CRS at this moment, transmitting terminal and receiving terminal suppose that all 2 ports have all launched CRS on the shared Resource Unit in CRS and vertical line zone; The RE that its bend covers representes the CRS that port one is corresponding; The RE that vertical line covers representes the CRS position of port 2 correspondences, but in fact, does not launch CRS on the RE that vertical line covers).

As shown in Figure 4; The Resource Unit label " 0 " that the 4th and the 5th and the 6th and the 7th OFDM symbol 1 Resource Block on frequency direction can be used arrives " 43 "; And the mapping mode of these 44 Resource Units can first time domain direction after frequency direction; Or time orientation after the first frequency direction, promptly can be that the 1st resource unit group is mapped on the Resource Unit of label for " 0 ", " 1 " correspondence, the 2nd resource unit group is mapped on the Resource Unit of label for " 2 ", " 3 " correspondence; ...; The 22nd resource unit group is mapped on the Resource Unit of label for " 42 ", " 43 " correspondence, also can be that the 1st resource unit group is mapped on the Resource Unit of label for " 0 ", " 1 ", correspondence, and it is on the corresponding Resource Unit in " 12 ", " 13 " that the 2nd resource unit group is mapped in label; The 3rd resource unit group is mapped on the Resource Unit of label for " 20 ", " 21 " correspondence; The 4th resource unit group is mapped on the Resource Unit of label for " 32 ", " 33 " correspondence ..., the 22nd resource unit group is mapped on the Resource Unit of label for " 42 ", " 43 " correspondence.

Embodiment two

Fig. 5 is the reference symbol bearing mode sketch map when carrying CRS and DMRS in the normal cyclic prefix unicast sub, and as shown in Figure 5, what represented this moment is the unicast sub of normal cyclic prefix, comprises 2 time slots in the subframe, and each time slot comprises 7 OFDM symbols.Suppose that R-PDCCH and R-PDSCH adopt TDM to combine the multiplex mode of FDM, and R-PDCCH originates in the 4th OFDM symbol of the 1st time slot, and end at last 1 OFDM symbol of the 1st time slot.Among Fig. 5, the RE that husky point covers is the RE that carries DMRS, and the RE that oblique line covers is for carrying the RE of CRS.

On the 4th the OFDM symbol among the RB in the 1st time slot, per 4 Resource Units are divided into 1 resource unit group, have 3 resource unit group, and per 4 complex symbols are mapped on the Resource Unit in the resource unit group; On the 5th the OFDM symbol among the RB in the 1st time slot; Per 6 Resource Units are divided into 1 resource unit group; Have 2 resource unit group, per 4 complex symbol control informations are mapped in the resource unit group not and are got final product on the shared Resource Unit of CRS; The 6th of the 1st time slot and the 7th OFDM symbol are bound processing; And per 4 Resource Units are divided into 1 resource unit group; Have 3 resource unit group; Per 4 complex symbols are mapped in the resource unit group not by on the shared Resource Unit of DMRS; The Resource Unit label " 0 " that as shown in Figure 5 the 6th and the 7th OFDM symbol 1 Resource Block on frequency direction can be used arrives " 11 "; And these 12 Resource Unit mapping modes can first time domain direction after frequency direction; Or time orientation after the first frequency direction, promptly can be that the 1st resource unit group is mapped on the Resource Unit of label for " 0 ", " 1 ", " 2 ", " 3 " correspondence, the 2nd resource unit group is mapped on the Resource Unit of label for " 4 ", " 5 ", " 6 ", " 7 " correspondence; The 3rd resource unit group is mapped in label and is " 8 ", " 9 ", " 10 ", " 11 "; Also can be that the 1st resource unit group is mapped on the Resource Unit of label for " 0 ", " 6 ", " 1 ", " 7 " correspondence, the 2nd resource unit group be mapped on the Resource Unit of label for " 2 ", " 8 ", " 3 ", " 9 " correspondence, and the 3rd resource unit group is mapped in label and is " 4 ", " 10 ", " 5 ", " 11 ".

Those skilled in the art are to be understood that; When carrying CRS and DMRS in the subframe; CRS is during corresponding to an antenna port, two antenna ports, four antenna ports; DMRS is during corresponding to an antenna port, two antenna ports, four antenna ports, eight antenna ports, and the mapping mode of resource unit group gets final product according to the mode of present embodiment.

Embodiment three

Fig. 6 is the reference symbol bearing mode sketch map when carrying CRS and DMRS in the multicast subframe of extended cyclic prefix, and is as shown in Figure 6, expression be the multicast subframe of extended cyclic prefix, subframe comprises 2 time slots, each time slot comprises 6 OFDM symbols.Suppose that R-PDCCH and R-PDSCH adopt the multiplex mode of FDM, and R-PDCCH originates in the 4th OFDM symbol of the 1st time slot, and end at last 1 OFDM symbol of the 2nd time slot.

Present embodiment is bound processing with 2 Resource Block on the frequency direction; On among the RB in the 4th OFDM symbol among the RB in the 1st time slot and the 2nd time slot the 1st and the 2nd and the 3rd and the 4th the OFDM symbol; Per 4 Resource Units are 1 resource unit group; Have 6 resource unit group, per 4 complex symbols are mapped on the Resource Unit in the resource unit group; On among the RB in the 1st time slot and the 2nd time slot the 5th and the 6th the OFDM symbol; Per 8 Resource Units are 1 resource unit group; Have 3 resource unit group, per 4 complex symbols are mapped in the resource unit group not by on the shared Resource Unit of DMRS.

Embodiment four

Fig. 7 is a relay sub-frame and the subframe of the carrying CSI-RS reference symbol bearing mode sketch map when same subframe not; As shown in Figure 7; Relay sub-frame and the subframe of carrying CSI-RS be not in same subframe, so do not conflict with CSI-RS during the resource unit group mapping, what illustrated relay sub-frame was represented is the unicast sub of normal cyclic prefix; Subframe comprises 2 time slots, and each time slot comprises 7 OFDM symbols.Suppose that R-PDCCH and R-PDSCH adopt TDM to combine the multiplex mode of FDM, and R-PDCCH originates in the 4th OFDM symbol of the 1st time slot, and end at last 1 OFDM symbol of the 1st time slot.

Among the RB in the 1st time slot the 4th with the 6th and the 7th OFDM symbol on, per 4 Resource Units are 1 resource unit group, have 3 resource unit group, per 4 complex symbols are mapped on the interior Resource Unit of a resource unit group; On the 5th the OFDM symbol among the RB in the 1st time slot, per 6 Resource Units are 1 resource unit group, have 2 resource unit group, and per 4 complex symbols are mapped in the resource unit group not by on the shared Resource Unit of CRS.

The subframe of stepchild's frame and carrying CSI-RS is not when same subframe in the middle of it will be appreciated by those skilled in the art that, the dividing mode of the resource unit group among the present invention is identical with the dividing mode of resource unit group before.

Embodiment five

Fig. 8 is relay sub-frame and the reference symbol bearing mode sketch map of subframe when same subframe that carries CSI-RS; As shown in Figure 8; Relay sub-frame and the subframe of carrying CSI-RS be in same subframe, so conflict with CSI-RS during the resource unit group mapping, what illustrated relay sub-frame was represented is the unicast sub of normal cyclic prefix; Subframe comprises 2 time slots, and each time slot comprises 7 OFDM symbols.

(1) suppose that R-PDCCH and R-PDSCH adopt TDM to combine the multiplex mode of FDM, and R-PDCCH originates in the 1st OFDM symbol of the 2nd time slot, and end at last 1 OFDM symbol of the 2nd time slot.(this instance hypothesis is meant that resource unit group is mapped in not by on the shared Resource Unit of CSI-RS and/or DMRS and/or reserved resource)

On among the RB in the 2nd time slot the 1st and the 2nd and the 5th the OFDM symbol; Per 6 Resource Units are 1 resource unit group; Have 2 resource unit group, per 4 complex symbols are mapped in the resource unit group not by on the shared Resource Unit of CRS; On among the RB in the 2nd time slot the 3rd and the 4th the OFDM symbol, per 12 Resource Units are 1 resource unit group, have 1 resource unit group, and per 4 complex symbols are mapped in the resource unit group not by on the shared Resource Unit of CSI-RS; Among the RB in the 2nd time slot the 6th and the 7th OFDM symbol are bound processing; Per 12 Resource Units are 1 resource unit group; Have 1 resource unit group, per 4 complex symbols are mapped in the resource unit group not by on the shared Resource Unit of CSI-RS and DMRS.

(2) suppose that R-PDCCH and R-PDSCH adopt TDM to combine the multiplex mode of FDM, and R-PDCCH originates in the 4th OFDM symbol of the 1st time slot, and end at last 1 OFDM symbol of the 1st time slot.(this instance hypothesis is meant that resource unit group is not mapped on the OFDM symbol identical with CSI-RS)

On the 4th the OFDM symbol among the RB in the 1st time slot, per 4 Resource Units are 1 resource unit group, have 3 resource unit group, and per 4 complex symbols are mapped on the Resource Unit in the resource unit group; On the 5th the OFDM symbol among the RB in the 1st time slot, per 6 Resource Units are 1 resource unit group, have 2 resource unit group, and per 4 complex symbols are mapped in the resource unit group not by on the shared Resource Unit of CRS; The 6th of the 1st time slot and the 7th OFDM symbol are bound processing, and per 4 Resource Units are 1 resource unit group, have 3 resource unit group, are mapped in the 6th and the 7th the OFDM symbol and not by on the shared Resource Unit of DMRS.

(3) suppose that R-PDCCH and R-PDSCH adopt TDM to combine the multiplex mode of FDM, and R-PDCCH originates in the 1st OFDM symbol of the 2nd time slot, and end at last 1 OFDM symbol of the 2nd time slot.(this instance hypothesis is meant the CSI-RS on the corresponding RE of resource unit group is removed that these Resource Units are used to shine upon resource unit group)

For example in the 3rd of the 2nd time slot the and the 4th and the 6th and the 7th, and in the PRB that is taken by R-PDCCH, remove CSI-RS, promptly do not launch CSI-RS, these Resource Units are used to shine upon resource unit group.

On among the RB in the 2nd time slot the 1st and the 2nd and the 5th the OFDM symbol; Per 6 Resource Units are 1 resource unit group; Have 2 resource unit group, per 4 complex symbols are mapped in the resource unit group not by on the shared Resource Unit of CRS; Among the RB in the 2nd time slot the 3rd with the 4th OFDM symbol on, per 4 Resource Units are 1 resource unit group, have 3 resource unit group, per 4 complex symbols are mapped on the interior Resource Unit of a resource unit group; Among the RB in the 2nd time slot the 6th and the 7th OFDM symbol are bound processing; Per 4 Resource Units are 1 resource unit group; Have 3 resource unit group, per 4 complex symbols are mapped in the resource unit group not by on the shared Resource Unit of DMRS.

(4) suppose that R-PDCCH and R-PDSCH adopt TDM to combine the multiplex mode of FDM, and R-PDCCH originates in the 1st OFDM symbol of the 2nd time slot, and end at last 1 OFDM symbol of the 2nd time slot.(this instance hypothesis is meant that CSI-RS is not mapped in the PRB that is taken by R-PDCCH)

Behind the PRB that for example system assignment R-PDCCH takies, CSI-RS hides the PRB that these are taken by R-PDCCH during mapping, shines upon CSI-RS on the Resource Unit in other PRB.

On among the RB in the 2nd time slot the 1st and the 2nd and the 5th the OFDM symbol; Per 6 Resource Units are as 1 resource unit group; Have 2 resource unit group, per 4 complex symbols are mapped in the resource unit group not by on the shared Resource Unit of CRS; Among the RB in the 2nd time slot the 3rd with the 4th OFDM symbol on, per 4 Resource Units are 1 resource unit group, have 3 resource unit group, per 4 complex symbols are mapped on the interior Resource Unit of a resource unit group; Among the RB in the 2nd time slot the 6th and the 7th OFDM symbol are bound processing; Per 4 Resource Units are 1 resource unit group; Have 3 resource unit group, per 4 complex symbols are mapped in the resource unit group not by on the shared Resource Unit of DMRS.

Select for use per 4 complex symbols to be mapped in the last just preferred embodiment of unappropriated RE in the resource unit group among the present invention; Complex symbol can be the complex symbol after the constellation modulation, the complex symbol after many antenna processing, and complex symbol carries said control information.The division principle of following embodiment and mode and embodiment one are identical, give unnecessary details no longer one by one.

The above embodiment of the present invention is merely preferred embodiment.Those skilled in the art are to be understood that; Being mapped in the resource unit group with 2 complex symbols also is feasible on the unappropriated RE; Perhaps; Being mapped in the resource unit group with 3 complex symbols also is feasible on the unappropriated RE, and perhaps, being mapped in the resource unit group with 6 complex symbols also is feasible on the unappropriated RE.Even in a RB or limited RB, the number of the unappropriated RE in the resource unit group of division can be different.

The present invention has also put down in writing a kind of definite device of repeated link resource unit group; Comprise: confirm the unit, be used for the cyclic prefix type during according to subframe type, subframe, the resource unit group that at least a information of reference symbol in the bearing mode of subframe is confirmed repeated link.The bearing mode of above-mentioned reference symbol in subframe confirmed according to the type and the said reference symbol corresponding antenna port number of carrying reference symbol.Above-mentioned definite unit is further confirmed: said resource unit group is made up of the Resource Unit RE on OFDM symbol among the RB; Perhaps, said resource unit group is made up of the RE on two above OFDM symbols among the RB; Perhaps, said resource unit group is made up of the RE among two adjacent on the frequency domain on the OFDM symbol above RB; Perhaps, said resource unit group is made up of the RE among two adjacent on the frequency domain on two above OFDM symbols above RB.

Definite device of repeated link resource unit group of the present invention is cell really; The mode of putting down in writing in main definite method by aforementioned repeated link resource unit group is confirmed resource unit group; Can understand the concrete function that definite unit of the present invention is realized referring to aforementioned description, repeating no more here, it realizes details.

The present invention has also put down in writing a kind of base station, includes definite device of aforesaid repeated link resource unit group, is used to relay sub-frame and confirms resource unit group

The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.

Claims

1. definite method of a repeated link resource unit group is characterized in that, said method comprises:

2. method according to claim 1 is characterized in that, the bearing mode of said reference symbol in subframe confirmed according to the type and the said reference symbol corresponding antenna port number of carrying reference symbol.

3. method according to claim 2 is characterized in that, said resource unit group is made up of the Resource Unit RE on orthogonal frequency division multiplex OFDM symbol among the Resource Block RB;

4. method according to claim 3 is characterized in that, only has the peculiar reference symbol CRS in sub-district in first in unicast sub and/or second time slot, wherein, and when CRS corresponding antenna port number is one, two or four; The resource unit group of said definite repeated link is:

On m the OFDM symbol among the RB in said first and/or second time slot; 12 RE are divided into two resource unit group; Every continuous six RE are a resource unit group, and per four complex symbols are mapped in the resource unit group not by on the shared Resource Unit of CRS; Perhaps, 12 RE are divided into four resource unit group, and every continuous three RE are a resource unit group, and per two complex symbols are mapped in the resource unit group not by on the shared Resource Unit of CRS;

For the unicast sub of normal cyclic prefix, m=1 and/or 5, for the unicast sub of extended cyclic prefix, m=1 and/or 4.

5. method according to claim 4; It is characterized in that; Only have CRS in unicast sub first and/or second time slot, when said CRS corresponding antenna port number was one, the mode when being two with CRS corresponding antenna port number was confirmed resource unit group.

6. method according to claim 3 is characterized in that, only has CRS in first in unicast sub and/or second time slot, and wherein, CRS corresponding antenna port number is that the resource unit group of said definite repeated link is when one or two:

7. method according to claim 3 is characterized in that, only has CRS in first in unicast sub and/or second time slot, and wherein, when CRS corresponding antenna port number was four, the resource unit group of said definite repeated link was:

8. method according to claim 3; It is characterized in that, only have the peculiar reference symbol CRS in sub-district in first in unicast sub and/or second time slot, wherein; When CRS corresponding antenna port number was one, two or four, the resource unit group of said definite repeated link was:

9. method according to claim 3; It is characterized in that; Have CRS and DMRS in unicast sub first and/or second time slot, and said DMRS corresponding antenna port number is when being one, two, four or eight, the resource unit group of said definite repeated link is:

10. method according to claim 3; It is characterized in that; Have CRS and DMRS in unicast sub first and/or second time slot, and said DMRS corresponding antenna port number is when being four or eight, the resource unit group of said definite repeated link is:

11. method according to claim 3; It is characterized in that; Have CRS and DMRS in unicast sub first and/or second time slot, and said DMRS corresponding antenna port number is when being one or two, the resource unit group of said definite repeated link is:

12. method according to claim 3 is characterized in that, when only having one, two or four CRS in first in multicast subframe and/or second time slot, the resource unit group of said definite repeated link is:

13. method according to claim 3 is characterized in that, when having CRS and DMRS in first in multicast subframe and/or second time slot, wherein, said CRS corresponding antenna port number is one, two or four; Said DMRS corresponding antenna port number is one, two, four or eight; The resource unit group of said definite repeated link is:

14. method according to claim 3 is characterized in that, when having CRS and DMRS in first in multicast subframe and/or second time slot, wherein, said CRS corresponding antenna port number is one, two or four; Said DMRS corresponding antenna port number is one, two, four or eight; The resource unit group of said definite repeated link is:

15., it is characterized in that said method also comprises according to each described method of claim 1 to 14:

16. definite device of a repeated link resource unit group is characterized in that, said device comprises:

17. device according to claim 16 is characterized in that, the bearing mode of said reference symbol in subframe confirmed according to the type and the said reference symbol corresponding antenna port number of carrying reference symbol.

18. device according to claim 17 is characterized in that, said definite unit is specially:

19. device according to claim 17 is characterized in that, only has CRS in first in unicast sub and/or second time slot, wherein, when CRS corresponding antenna port number is one, two or four, said definite unit further,

20. device according to claim 19; It is characterized in that; Only there is CRS in unicast sub first and/or second time slot; When said CRS corresponding antenna port number is one, said definite unit further, the mode when being two with CRS corresponding antenna port number is confirmed resource unit group.

21. device according to claim 17 is characterized in that, only has CRS in first in unicast sub and/or second time slot, wherein, CRS corresponding antenna port number is when one or two, said definite unit further,

22. device according to claim 17 is characterized in that, only has CRS in first in unicast sub and/or second time slot, wherein, when CRS corresponding antenna port number is four, said definite unit further,

23. device according to claim 17 is characterized in that, only has CRS in first in unicast sub and/or second time slot, wherein, when CRS corresponding antenna port number is one, two or four, said definite unit further,

24. device according to claim 17; It is characterized in that, have CRS and DMRS in first in unicast sub and/or second time slot, and said DMRS corresponding antenna port number is when being one, two, four or eight; Said definite unit further

25. device according to claim 17 is characterized in that, has CRS and DMRS in first in unicast sub and/or second time slot, and said DMRS corresponding antenna port number is when being four or eight, said definite unit further,

26. device according to claim 17 is characterized in that, has CRS and DMRS in first in unicast sub and/or second time slot, and said DMRS corresponding antenna port number is when being one or two, said definite unit further,

27. device according to claim 17 is characterized in that, when only having one, two or four CRS in first in multicast subframe and/or second time slot, said definite unit further,

28. device according to claim 17 is characterized in that, when having CRS and DMRS in first in multicast subframe and/or second time slot, wherein, said CRS corresponding antenna port number is one, two or four; Said DMRS corresponding antenna port number is one, two, four or eight; Said definite unit further,

29. device according to claim 17 is characterized in that, when having CRS and DMRS in first in multicast subframe and/or second time slot, wherein, said CRS corresponding antenna port number is one, two or four; Said DMRS corresponding antenna port number is one, two, four or eight; Said definite unit further,

30. according to each described device of claim 16 to 28; It is characterized in that; When said definite unit confirms that further the subframe of relay sub-frame and carrying CSI-RS is identical, confirm that said resource unit group is by not constituted by CSI-RS and/or DMRS and/or the shared RE of reserved resource; Perhaps, said resource unit group is made up of the RE on the OFDM symbol that does not comprise CSI-RS; Perhaps, CSI-RS is not carried in the PRB that R-PDCCH takies.

31. a base station is characterized in that, comprises definite device of each described repeated link resource unit group of claim 16 to 30, is used to relay sub-frame and confirms resource unit group.